Answer:
LH reaches its highest concentration on day 13. This causes the follicle to burst, releasing the ovum, and the follicle begins to develop into a corpus luteum.
The level of LH in the bloodstream at its highest at the 14th day of the menstrual cycle. Ovulation takes place ta the 14th day of the month which does ovulation.
What is the full form of LH ?The full form of LH is leutinizing hormone.
Corpus luteum is formed at the 14th day of the cycle that is the matured graffian follicle when releases an ovum then the matured graffian follicle makes the structure called as the corpus luteum which is yellowish in color.
With the increase in LH, other hormones also peak up because the hormones have to be associated with the thickening of the uterus walls and the walls of uterus have to be thickened up so as to make the uterus fit for baby production.
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which of these contain phytochemicals? a) tomatoes b) egg yolks c) fish d) all of the above
(D) All the above contains phytochemicals.
Fruits and vegetables, whether fresh or processed, are among the most significant sources of phytochemicals in the human diet. So far, around 200,000 phytochemicals have been found, with 20,000 of them originating from fruits, vegetables, and cereals.
Plants use phytochemicals to defend themselves, which means they help protect budding buds and sprouts against pollution, insects, and the weather. That most of these protective properties are passed on to us when we consume fruits and vegetables rich in phytochemicals.
Phytochemicals are non-nutritional bioactive ingredients that are primarily accountable for scavenging harmful radicals following oxidative stress by producing antioxidants, which are the root cause of the majority of chronic illnesses.
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which is the correct sequence of components leading up to and following secretion of thyrotropin-releasing hormone (trh), thyroid-stimulating hormone (tsh), and other hormones by the thyroid gland?
Thyroid gland working mechanism:
Changes in external stimulus → hypothalamus → TRH → anterior pituitary →TSH → thyroid gland → thyroxine
The thyroid gland consists of 2 lobes, namely the right and lobes left associated with a narrow section called isthmus form-like bowties. Thyroid hormones control the rate of burning glucose or oxidation, which is converted into body heat and chemical energy. The raw material for thyroid hormone is iodine which is abundantly contained in seafood
Step-by-step working mechanism thyroid gland:
If the hypothalamus is stimulated.Hypothalamus secretes TRH.Stimulates the anterior pituitary.Secretes TSH.Stimulates the thyroid gland.Secretes thyroid hormones (T3 and T4).Increased metabolic rate, CNS development, and sympathetic activity.Learn more about the working mechanism thyroid gland here https://brainly.com/question/28497771
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The latitudes at which hot deserts are found have enough direct solar heating to produce high temperatures. Which of these is another primary factor that defines deserts?
Responses
The primary factor for desert is where atmospheric convection in a dry air mass hot deserts are fount at this latitudes.
What is a factor that defines deserts?Ascending and descending air creates areas of high and low pressure. As the air heats, it rises, resulting in low pressure at the surface.
As the air cools, it descends, resulting in high pressure at the surface. Low-pressure systems are typically associated with clouds and precipitation,
Which minimizes temperature changes throughout the day, whereas high-pressure systems are typically associated with dry weather and mostly clear skies.
Therefore dry air mass defines a desert and has a high temperature.
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Which bond or bonds in α‑d‑glucose must be broken to change its configuration to β‑d‑glucose?.
To convert α-D-glucose to the β-D-glucose, the bond among the C-1 and the hydroxyl on the C-5 should be damaged and the reformed withinside the contrary of the configuration.
To convert the D-glucose to the D-mannose, both the —H or the —OH on C-2 that should be damaged and reformed withinside the contrary of the configuration. Conversion among chair and the conformations does now no longer require a bond the breakage; that is the essential and difference among the configuration and the conformation.
α-D-glucose and β-D-glucose is the instance of an anomers. An Anomer is a saccharide most effective the differs in its shape on the anomeric of the carbon. Anomeric carbon is being the purposeful organization of the carbohydrate, wherein is commonly the carboxyl organization which is connected to it. Epimeres, is fluctuate at most effective the only chiral center, now no longer the anomeric carbon.
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( will give brainliest and 5 stars)which of the following terms best describe meiosis? select four that apply
The four terms that best describe meiosis are gametes, 4 cells produced, independent assortment and genetic variation.
The type of cell division that takes place in sexually-reproducing organisms is called meiosis. In this process, a single gametic cell undergoes division twice to form four daughter cells, each containing only half the genetic information of the parent cells.
Recombination between the gametes i.e., exchange of genetic material between them, occurs in Prophase 1 of meiosis, which gives rise to genetically varying cells. The chromosomes then move to opposite poles and segregate independently of each other to form gametes and this process is called independent assortment.
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Marine Science Explain the law of conservation of energy.
The law of conservation of energy states that energy can neither be created nor be destroyed in a chemical reaction or biological system. Although, it gets transformed from one form to another.
What is an example of the law of conservation of energy?An example of the law of conservation of energy is as follows:
When you roll a toy car from a flat staircase, it will fall into the ground where the kinetic energy gets transferred into potential energy.This may be clearly understood by the fact when taking all forms of energy are present in the environment, the total energy of this isolated environment always remains constant. This reveals the law of conservation of energy.
Therefore, the law of conservation of energy is well described above.
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what are disruptive, directional and stabilizing selection and which is most likely to lead to speciation? what are examples of each?
Natural selection in which a single phenotype is favored is Directional, in which extreme values of trait are favored over intermediate is disruptive and which favors stabilized phenotype is stabilizing selection.
Directional Selection
On the Origin of Species by Means of Natural Selection, or the Preservation of Favored Races in the Struggle for Life, the seminal 1859 work by the English biologist and scientist Charles Darwin, was the first to identify directional selection as a type of natural selection.
According to the directional selection theory, an extreme phenotype—a set of features or characteristics—is preferred to other phenotypes, and as a result, the allele frequency—the frequency with which a gene variant appears in a population—shifts over time in favor of the extreme phenotype. In other words, a feature will manifest itself in the population with the highest frequency if it is favorable.
Giraffe neck lengths serve as an illustration of directed selection. Because they could reach more food in the trees, giraffes with longer necks were favored by the environment's selection pressure. At the same time, giraffes with shorter necks faced selection pressure. Both long and short necks are extreme phenotypes, but due to selection pressure over time, the long neck phenotype predominated; that is, this characteristic in giraffes moved in favor of long necks.
Stabilizing Selection
Stabilizing selection is also referred to as "middle-of-the-road" selection since it favors a non-extreme characteristic over one of the two extreme ones. Plant height is an illustration of this. Short plants may not receive enough sunlight in a population of plants, and towering plants may sustain wind damage. This causes a decrease in the number of very tall and very short plants and an increase in medium-height plants. Stabilizing selection is thought to be the most prevalent method of natural selection because most features do not change significantly over time.
Human birthweight and bird egg production are two other instances of stabilizing selection (clutch size). Human babies' birth weights keep within a range because newborns with extremely low birth weights have a lower chance of surviving and those with extremely high birth weights can cause difficulties during delivery that endanger both the mother and the baby's lives. There is a maximum number of eggs that can be laid by a certain bird species in a clutch. The clutch should contain just the right number of eggs to protect it against disease and/or predators, but not too many that the parent(s) will have trouble feeding.
Selective Disruption
Natural selection of this kind favors extreme features in a population and is bimodal. For instance, some pollinators in a population of plants will visit the tallest plants, while another species will visit the medium-height plants, and a third species will favor the lowest plants. Natural selection would favor tall and short plants, the two extreme phenotypes, and remove the pollinator that favors medium-height plants, causing medium-height plants to become less common.
The size of the beaks of finches on the Galapagos Islands, which Darwin observed, is a more well-known illustration of disruptive selection. Finches with large and small beaks (no finches with medium-sized beaks) were preferred on certain of the islands because the bulk of seeds discovered there was either huge or small.
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An
(beginning/ end) of a gene is the most harmful.
(insertion / substitution) mutation at the
The most dangerous gene mutation is frameshift.
Which mutation is the most harmful?The DNA sequence is most severely damaged by mutations brought on by the insertion or deletion of nitrogenous bases because they entirely alter the reading frame for the process of protein production. The most harmful mutation is thought to be a frameshift mutation caused by an insertion or deletion.
Which is worse for you, insertion or substitution?Insertions and deletions typically do more damage than substitutions, which only change one amino acid, since they create a frame-shift that alters the reading of succeeding codons and, consequently, changes the complete set of amino acids that follow the mutation.
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how to find the mean mass?
2.5 ÷ 1.5x10^4 = .000167 g = answer
If a dna sequence is altered from tagctga to tagtga, what kind of mutation has occurred?.
If a DNA sequence is altered from TAGCTGA to TAGTGA, then the kind of mutation that has occurred is deletion.
In the field of biology, such a mutation in which a single nucleotide or more than one nucleotide has been removed or eliminated from the DNA sequence is referred to as a deletion mutation. In the scenario above, as the nucleotide cytosine (C) is being eliminated, hence it is a deletion mutation.
A deletion mutation can also cause an entire chromosome to disappear.
A deletion mutation might occur due to many factors. Sometimes, an environmental or chemical hazard can cause a deletion mutation. Other times, it might happen that during DNA replication, an error might occur due to which one or more nucleotides are missed during the time of replication.
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a microbiologist wants to estimate the concentration of a certain type of bacterium in a waste-water sample. she puts a 0.5 ml sample of the wastewater on a microscope slide and counts 39 bacteria. estimate the concentration of bacteria, per ml, in this wastewater, and find the uncertainty in the estimate.
The uncertainty of getting bacterial concentration in wastewater is pretty low as wastewater contains more bacteria and number of bacteria in per ml is 7.8
Estimating the microbial concentration in a sample is determined by various methods like - pour plating, spread plating and serial dilution. In estimation of microbial concentration, we need nutrient broth and an inoculum (a sample from where the sample will be taken and inoculated).
In the given condition we have 0.5 ml of sample and the microscopic counts of 39 bacteria at a time.
Therefore, for the number of bacteria = 39 and
solution = 0.5ml.
39/0.5 = 7.8
Therefore, the number of bacteria per ml of solution is 7.8
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1) During the 1950's, several scientists were responsible for discovering the structure of DNA. One scientist, Erwin Chargaff, found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are always equal. What does Chargaff's discovery indicate about the structure of DNA and its impact on replication? All BUT ONE choice could apply.
A.)Adenine pairs with thymine; guanine with cytosine.
B) The base pairing facilitates DNA replication and RNA transcription. Eliminate
C) When pairing nucleotides, you must pair a purine with a pyrimidine.
D) If we read the sequence of nucleotides on one strand of DNA, we can identify the complementary sequence on the other strand.
Chargaff's discovery about the structure of DNA and its impact on replication is associated with the observation that adenine pairs with thymine; while guanine pairs with cytosine (Option A).
What is the deoxyribonucleic acid (DNA) molecule?The deoxyribonucleic acid (DNA) molecule is a double helix molecule composed of two chains of nucleotides (adenine or A, guanine or G, cytosine or C and thymine or T) linked via hydrogen bonds, where A pairs with T via two hydrogen bonds, while C pairs with G via 3 hydrogen bonds.
Therefore, with this data, we can see that in the deoxyribonucleic acid (DNA) molecule adenine pairs with thymine while cytosine pairs with guanine.
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during cellular respiration the energy in glucose is used to manufacture glucose. is released all at once. is stored and carried by electrons. becomes stored in molecules of water.
During cellular respiration the energy in glucose is stored and carried by electrons
What is Cellular respiration ?A glucose molecule gradually degrades into water and carbon dioxide during cellular respiration. During the process of transforming glucose, some ATP is created immediately. However, oxidative phosphorylation, a process, results in the production of significantly more ATP.
In order to get chemical energy for cellular processes, organisms require oxygen to break down food molecules during cellular respiration. In addition to algae and other protists, cellular respiration also occurs in the cells of animals, plants, and fungus.The activity is known as "cellular respiration" because the cell seems to "respire" by consuming molecular oxygen (as an electron acceptor) and exhaling carbon dioxide (as an end product).Learn more about Cellular respiration here:
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which solvent is a commonly used to extract all the lipids from homogenized tissue samples and subsequent separation of the lipids from the proteins and sugars present in those samples?
Solvents that are used to extract the lipids from homogenized tissue samples and subsequent separation of the lipids from the proteins and sugars present are methanol and chloroform.
How are lipids extracted?Lipids are extracted using solvent-based techniques. In some cases, solvents are subjected directly into cell pellets, but in other cases, solvents are employed during disruptions of cell.
Lipids are insoluble in polar solvents like water but highly soluble in non-polar or weakly polar organic solvents like ether, chloroform, benzene, and acetone.
The Bligh and Dyer method is a widely practiced methods for lipid extraction. It is very similar to the Folch method, but differs in solvent/solvent and solvent/tissue ratios.
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what volume of mating mix (mixture of donor and recipient) will you spread plate on to a luria agar dap plate?
200 microliters volume of mating mix spread plate on to a luria agar dap plate
What does a Luria test entail?In order to complete the Luria's Test (also known as the "fist-edge-palm" test or Luria Sequence), the patient must duplicate three hand motions made by a medical professional. The Frontal Assessment Framework (FAB) is a set of tests that includes Luria's test.
What symptoms denote frontal release?A certain region of the brain, usually the frontal lobes, has an inhibitory effect that causes the reflex to decrease as the brain ages. When disease processes disrupt these inhibitory pathways, the response is "liberated" from inhibition and can then be triggered again. The term "frontal release sign" was created for this reason.
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in mice, the copy of the igf 2 gene that is inherited from the mother is never expressed in her offspring. this happens because the igf 2 gene from the mother a. always undergoes a mutation that inactivates its function. b. is deleted during oogenesis. c. is deleted during embryonic development. d. is not transcribed in the somatic cells of the offspring.
in mice, the copy of the if 2 gene that is inherited from the mother is never expressed in her offspring. this happens because the if 2 gene from the mother is not transcribed in the somatic cells of the offspring.
Option B is Correct : is not transcribed in the somatic cells of the offspring.
Somatic cells in humans are diploid, which means they have two sets of chromosomes, one from each parent. Although somatic cell DNA mutations can have an impact on an individual, they cannot be passed on to a person's progeny.somatic tissues. All living things are composed of somatic cells, which are the basic building blocks of all organisms. Somatic cells in humans are diploid, which means they have two sets of chromosomes, one set from each parent. Somatic mutations can affect the person who has them but cannot be passed on to their offspring and have no impact on them.
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when fenesha broke her ankle, the doctor gave her a drug that eased her pain by binding with endorphin receptors. the drug that she took is an endorphin: a. agonist b. antagonist c. reuptake inhibitor d. stimulant
The drug that she took with the doctor's advice was an endorphin stimulant.
When your body experiences stress or pain, endorphins are hormones that are released. They're created in the brain and serve as messengers throughout the body. Endorphins are created to help with pain relief, stress reduction, and mood enhancement. The drugs that we take when we feel pain is generally an endorphin stimulant, usually opioids, that help us relieve pain.
A group of peptides known as endorphins are produced by the pituitary gland and the central nervous system. The opiate receptors in your brain are activated by these neurotransmitters, which also have the potential to act as hormones.
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If ATP is not present, the Calvin cycle will shut down. True or false?
Answer: True
Explanation:
How do the cells produced by meiosis
compare to each other?
A. Two of them are identical to each other.
B. They are all identical.
C. All four are genetically different.
In meiosis all four are genetically different. So, the correct answer is option (C) All four are genetically different.
Meiosis is the form of cellular department that creates egg and sperm cells. Mitosis is a fundamental system for existence. in the course of mitosis, a mobile duplicates all of its contents, such as its chromosomes, and splits to form two identical daughter cells.
Meiosis is a type of mobile department that reduces the wide variety of chromosomes within the discern cell by means of half and produces four gamete cells. This procedure is required to provide egg and sperm cells for sexual reproduction.
Meiosis takes place inside the primordial germ cells, cells exact for sexual duplicate and break free the frame's ordinary somatic cells. In instruction for meiosis, a germ cellular is going through interphase, in the course of which the complete cellular undergoes replication.
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a sediment layer has a faunal assemblage consisting of mollusks with an age range from paleocene through miocene, corals with an age range from oligocene through pleistocene, and shark teeth with an age range from the eocene through the oligocene. during what geologic epoch was this layer deposited?
During Miocene geologic epoch was this layer deposited as major phases of the geology of the mountains occurred during the Miocene.
The Miocene (/ˈmaɪ.əsiːn, -oʊ-/ MY-ə-seen, -oh-) is the primary topographical age of the Neogene and expands from approximately 23.03 to 5.333 million a long time prior (Ma).
The Miocene was named by Scottish geologist Charles Lyell; the title comes from Greek words that imply age since it has 18% less advanced marine spineless creatures than the Pliocene has.
The Miocene is gone before the Oligocene and is taken after by the Pliocene. As Soil went from the Oligocene through the Miocene and into the Pliocene, the climate gradually cooled towards an arrangement of ice ages.
The Miocene boundaries are not checked by a single unmistakable worldwide occasion but comprise or maybe territorially characterized boundaries between the hotter Oligocene and the cooler Pliocene Epoch.
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in what direction do protons flow during chemiosmosis in chloroplasts? group of answer choices from the matrix into the stroma from the stroma into the cytosol from the thylakoid space to into the stroma from the intermembrane space into the stroma from the stroma into the thylakoid space
Direction in which protons flow during chemiosmosis in chloroplasts are : from the stroma into the thylakoid space.
Where do protons flow during chemiosmosis in chloroplasts?The chemiosmotic process in chloroplasts occurs during photosynthesis. The energy of electron is used to pump proton from stroma into the thylakoid lumen and when protons move back to stroma then they pass through ATP synthase.
The process of moving ions to the other side of a biological membrane is known as chemiosmosis.
Electrochemical gradient is generated in chemiosmosis which is used to drive ATP synthesis. During this process, hydrogen ions get collected in the thylakoid membranes.
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Charged ions are traveling through a cell membrane with the concentration gradient. Which process is represented here?.
The process of charged ions traveling through a cell membrane with the concentration gradient represents simple diffusion.
When the surface area to volume ratio is higher, the distance travelled is shorter, and the concentration gradient is more pronounced, the process is more effective. Simple diffusion is the process of a solute moving between two compartments divided by a membrane permeable to it. As a result, we can infer that charged ions are moving through a cell membrane along a gradient of concentration. This is an illustration of basic diffusion.
Diffusion causes a net movement along a concentration gradient by including the haphazard movement of individual molecules or ions. It is known as facilitated diffusion when substances are transported across the bilayer by a protein present in the membrane, which can either be a transporter or a channel protein in the case of ions.
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what is not a mutagen? a. chemicals in tobacco smoke b. fungal toxins c. all of the above are mutagens d. ultraviolet light e. industrial pollution
These substances are all mutagens.
What purposes do mutagens serve?Many mutagens are employed to kill cancer cells because they are very harmful to growing cells. Chemotherapy may involve the use of intercalating drugs like daunorubicin and doxorubicin as well as alkylating agents like cyclophosphamide and cisplatin.
What consequences do mutagens have?Additionally, lesions that increase the number of single-stranded regions in the genome may be introduced by mutagens that rapidly degrade DNA, leading to even higher frequencies of recombination.
How do mutagens cause harm?A mutagen is a substance that can permanently alter cells' genetic material, perhaps resulting in heritable genetic harm or cancer.
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the equilibrium potential for potassium is about -90 mv. if potassium channels remained open and all other ion channels were closed, the voltage inside a neuron would be
The voltage inside a neuron would be about +66mV.
Voltage-gated potassium ions (VGKC) are membrane channels that are responsible for repolarizing the depolarized cell after each nervous impulse. As a result, they play a key role in modifying neuronal activity in the CNS and the peripheral nervous system.
The potassium channels with two pore domains are made up of a dimer of protein, each with four transmembrane segments. These 'leaky channels' are always open, contributing to the plasma membrane's substantially increased permeability to K+.
Potassium channels participate in membrane repolarization, which occurs after depolarization by sodium and, in certain circumstances, calcium channels during in the nerve impulse; this is required for restoring the membranes to a negative resting state and terminating the action potential signal.
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the step of dna replication in wwhich two replication forks moving in opposite directions may meet is called
Termination is the stage of DNA replication where two replication forks that are traveling in opposing directions may collide.
What transpires when two replication forks collide?When convergent replication forks collide, DNA replication is complete. DNA synthesis is finished, the replication apparatus is disassembled, and daughter molecules are resolved during this procedure, which is referred to as replication termination.
Do replication forks go in opposing directions?The DNA strand is traversed by the replication fork, which normally moves from an internal location to the end of the strand. As a result, each replication fork has a twin replication fork that originates from the same internal position and moves to the opposite end of the strand.
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What are some of the changes that have occurred in the past 50 years that have led us to now take 80 to 90 million metric tons of fish out of the sea every year?
Answer: We created more effective and superior fishing methods. In addition, our population has increased, meaning there are more people to eat fish.
Over the past 50 years, the production of fish and seafood has doubled worldwide. In addition to the fact that the world's population has more than doubled during this time, the average person now consumes about twice as much seafood as they did fifty years ago. Fish stocks all across the world are under more strain as a result of this. Since the 1980s, the proportion of fish populations that are overexploited globally—meaning that humans harvest them more quickly than they can reproduce to maintain population levels—has more than doubled, making the current levels of wild fishing unsustainable.
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the topology of membrane proteins can often be predicted by computer programs that identify which kind of topogenic segment?
Hydrophobic topogenic segment.
The number and approximate locations of the transmembrane segments of a protein's topology of an integral membrane protein's sequence, as well as the protein's general orientation in a membrane, are described.
Computer programs that recognize hydrophobic tropogenic portions within the amino acid sequence and genetic hydropathy profiles may frequently predict the structure of membrane proteins with high accuracy.
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How can the problem of pollution in the shatt al-arab river be solved
Answer: The conflict started first off because of people dumping solid waste and sewage into the river. So in order to resolve this conflict people should really just stop littering waste into the river which damages it and causes pollution which is just the thing that we need right now.
Explanation: I hope this helps!!!!!!!!!!
in the mystery urinalysis lab, which suspect's microscopic evaluation indicated calcium oxalate crystals?
In the mystery urinalysis lab, Brad suspect's microscopic evaluation indicated calcium oxalate crystals.
What do you mean by urinalysis?A urine test is known as a urinalysis. It is used to identify and treat a variety of illnesses, including diabetes, renal disease, and urogenital infections. A urinalysis involves examining the color, consistency, and composition of urine.
What is microscopic evaluation?The first identification of herbs, the identification of minute fragments of crude or powdered herbs, the detection of adulterants (such as insects, animal feces, mold, fungi, etc.), and the identification of the plant by distinctive tissue features all require microscopic analysis. Every plant has a unique tissue structure, which can be seen by examining how the tissues are arranged and how the cell walls and configuration are when the plant is appropriately mounted in stains, reagents, and media. With a drop of phloroglucinol and strong hydrochloric acid, lignin stains crimson or pink. Starch and hemicellulose are dyed blue by N/50 iodine solution, while mucilage is stained pink by ruthenium red. In-depth research has been done on the distinguishing characteristics of cell walls, cell contents, starch grains, calcium oxalate crystals, trichomes, fibers, vessels, etc.
Thus from above conclusion we can say that in the mystery urinalysis lab, Brad suspect's microscopic evaluation indicated calcium oxalate crystals.
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biologists recently discovered that black wolves got their coat color from exchanging genes with dogs. this is an example of
Using the theories of genes, we find that gene flow is the example of discovery in which black wolves got their coat color from exchanging genes with dogs.
In biology, actually word gene can have several different meanings. The Mendelian gene is the basic unit of heredity and the molecular gene is a sequence of nucleotides in the DNA that is transcribed to produce a functional RNA. There are basically two types of molecular genes: protein-coding genes and noncoding genes.
During the gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be actually intermediate template for a protein that performs a function. The transmission of the genes to an organism's offspring is the basis of the inheritance of the phenotypic traits. These genes make up different DNA sequences called the genotypes.
Hence, discovery by biologists that black wolves got their coat color from exchanging genes with dogs is an example of gene flow.
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