The multicellular haploid gametophyte (from the Greek phyton, "plant") produces gametes. A multicellular diploid sporophyte is created through fertilization, and through meiosis, it creates haploid spores. A haplodiplontic life cycle is the name given to this sort of life cycle.
As a result of the alternation of generations, plants alternate between two distinct life stages, or generations, throughout their life cycle: the haploid gametophyte stage and the diploid sporophyte stage. The terms haploid and diploid describe how many chromosomes each cell has.
The haploid (n) stage of the alternation of generations life cycle is known as the gametophyte stage. Because it will produce gametes, or sex cells, the gametophyte stage can also be viewed as the sexual stage. There is only one set on this stage of chromosome.
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Concept of artificial ecosystems
Hello..!
They are created with the intervention of the human being and can be modified at any time
Example:
Urban ecosystems; The gardensAgricultural ecosystems; the orchardswhich component of the epidermis initiates immune responses and provides a defense against environmental antigens?
Answer:
Which component of the epidermis initiates immune responses and provides a defense against environmental antigens?
~Langerhans cells~
Explanation:
The Three Domain classification system developed by Dr. Woese is based partly on
O sensitivity to antivirals.
O RNA sequences.
O enzyme similarities.
O DNA sequences.
Dr. Woese's three Domain classification approach is partially based on RNA sequences. The three-domain classification system was put forward as an alternative to the conventional prokaryote-eukaryote and five-kingdom concepts.
Organisms can be divided into one of three domains according to differences in the ribosomal RNA (rRNA) nucleotide sequences, antibiotic susceptibility, and membrane lipid structures. Woese divided them into groups based on differences in the 16S ribosomal RNA (rRNA) structure. Carl Woese from the University of Illinois in the United States proposed a phylogenetic taxonomy of bacterial species in 1987 using variations in the nucleotide sequence of 16S rRNA molecules.
Thus, we can conclude that RNA sequences serve as a foundation for some of Dr. Woese's Three Domain classification methods. Eukarya, Bacteria, and Archaea are the three domains.
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Review the student data. Which trials, if any, indicated that osmosis took place?
Responses
A vinegar and blue distilled water vinegar and blue distilled water
B 10% salt water and blue distilled water10% salt water and blue distilled water
C vinegar, syrup, and blue distilled water vinegar, syrup, and blue distilled water
D blue distilled water
The trials that indicated that osmosis took place is: vinegar and blue distilled water; option A.
What is osmosis?Osmosis is a process by which molecules of water are transported from one region to another.
Osmosis is defined as the process by which water molecules move from a region of low solute concentration to a region of high solute concentration through a semi-permeable membrane.
An example of osmosis taking place is when water molecules move hypotonic solution such as distilled water into vinegar a hypertonic solution.
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Muscular strength is the ability of the ________ to exert force during an activity.
Muscular strength is the ability of the muscles to exert force during an activity.
We can describe muscular strength as the strength of the muscles in a person that allows him to lift heavy objects.
The muscular strength of a person can be built if a person engages in exercises that help in building his muscles. Also, muscle strength can be increased by lifting heavy objects constantly.
However, special care needs to be taken when building muscle strength as it can cause muscle damage.
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identify the major structures and functional areas of the cerebral cortex and cerebrum including the basal nuclei
The cerebrum, cerebellum, and brainstem are the three major components of the brain. The brain's main structure, the cerebrum, is made up of the right & left halves.
Describe the cortex.Your cerebral cortex, which is located on atop of your cerebrum, is its outer layer. The greatest part of your brain is called your cerebrum. The corpus callosum, a network of nerve fibers, connects the hemispheres together.
What bodily organ is the cortex?The term "cortex," which is Latin for "bark," refers to the cerebrum's outer layer of gray matter. Due to it's own folds, the brain has a huge surface area and makes up nearly half of the weight of the brain. There are two parts to the cerebral cortex:
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which type of muscle would you expect to be guarding the opening between the stomach and the small intestine?
The muscle that guards the gap between the stomach and small intestine is known as a sphincter or circular muscle.
What is the function of smooth muscle?In the cardiovascular system, smooth muscle is utilized in vessels to control blood pressure and flow; in the lungs, it opens and closes airways; in the gastrointestinal system, it contributes to motility and nutrition absorption; and yet it still has functions in nearly every other organ system.
Your digestive tract is made up of what kind of muscle?The uterus, the digestive tract, and blood veins like arteries are just a few of the interior tissues that contain smooth muscle. Wave-like contractions occur down the length of the structure's smooth muscle, which is structured in stacked sheets.
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How are ecosystems started
Answer:
An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms.
Which of the following affects recreational activities that people do in a region?
A.
soil type
B.
plants
C.
presence and quality of water
D.
oil
Answer:
A. Soil Type, B. Plants, and C. Presence and Quality of Water
Explanation:
A) Soil contains air, water, and minerals as well as plant and animal matter, both living and dead, which is why it must be the first answer
B) Plant Elements include nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, chlorine, iron, manganese, zinc, copper, molybdenum, and nickel. It is used for photosynthesis
C) Do i really need to explain this one?
the mutation that causes cystic fibrosis affects several traits and is, therefore, an example of a(n)
Cystic fibrosis affects several traits, therefore, it is an example of a pleiotropy .
Pleiotropy occurs when a gene mutation affects numerous traits, or when it results in many mutant phenotypes, affecting more than one attribute.
Pleiotropic genes are those that show multiple phenotypic expression. Due to the gene's product being employed by several cells or diverse targets with the same signaling function, a pleiotropic gene mutation may affect multiple features at once.
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why do humans suffer from sleepiness, decreased muscle activity, and decreased sex drive during illness? group of answer choices the virus saps the organism's energy and uses it to attack the body. an illness decreases blood flow to the brain and muscles. they are useful ways of conserving energy while the body is attacking the illness. the body is so weakened from illness that it cannot do much of anything.
Humans suffer from these shortcomings during sickness as they are useful ways to conserve energy while the body is fighting the sickness.
How does our body fight illness?
Keeping foreign things out of our body is the most general way for our body to fight illness. This is the primary job of the immune system of our body.
Our primary defense against harmful things is the physical barriers, like skin. Our body also produces chemicals that destroy pathogens like, lysozyme that are found on skinless parts of our body, which includes tears and mucus membranes.
As long as the immune system works smoothly, we don’t even notice its presence. But the reason we get ill/sick is when it stops working properly. This is due to a weak immune system or harmful aggressive bacteria.
Without our immune system, we would be susceptible to all and every harmful pathogen.
Hence, when we get sick, we suffer with things like decreased muscle activity, sleepiness etc as our body is conserving energy as it fights off the illness.
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the evolution of decreased virulence would be expected in a no, that's not the correct answer. a. horizontally transmitted parasite. b. parasite species in which multiple infection is frequent. c. host with an effective immune system. d. vertically transmitted parasite.
Evolution of decreased virulence would be expected in a no of vertically transmitted parasite.
Virulence is defined by the ability of a microorganism to cause disease in the host . Parasites get transmitted from a parent to its offspring at or before birth, this case is called vertical transmission of parasite.
When , parasites are transmitted by contact from an infected individual to an uninfected individual, in that case the transmission is said to be horizontal. For example ,vertically transmitted can be disease caused by virus or bacteria that is transferred from mother to child .
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17.plants containing only chlorophyll b are exposed to radiation with the following wavelengths: 10nm(x-rays), 450nm (blue light), 670nm (red light), 670nm (red light), and 800nm (infrared light). which plants harness (use) the most energy for photosynthesis? blue light irradiated plants.
The greatest energy is captured (used) for photosynthesis by plants exposed to blue light.
Platids, which can be rounded, oval, or disk-shaped bodies and are used in the synthesis and storage of food, include chloroplasts. The presence of the two pigments chlorophyll a and chlorophyll b gives chloroplasts their distinctive green colour, which sets them apart from other plastid types. The pigments' ability to absorb light energy for photosynthesis is one of their functions. The chloroplasts include other pigments, such as carotenoids, which act as accessory pigments by absorbing sun energy and transferring it to the chlorophyll. All green tissues in plants have chloroplasts, although they are notably dense in the parenchyma cells of the leaf mesophyll.
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when people have a bacterial infection, pyrogens are often released to maintain elevated body temperature, which helps kill the bacteria causing the infection. which answer option is the most likely action of pyrogens on thermoregulation?
The most likely action of pyrogens on thermoregulation is that these substances will reset the set point of the sensors and cause the death of the bacteria.
Endogenous pyrogens are substances that are released into the blood when phagocytic leukocytes kill a bacterium. The hypothalamus receives these pyrogens and the thermostat (sensors) is reset. This enables the condition known as a fever, in which the body's temperature rises. A nutrient required by bacteria is reduced as a result of iron becoming more conserved when body temperature rises.
The pathogen may also be killed by heat itself. The hypothalamus regulates body temperature through reflexes that result in sweating and vasodilation when the body is too warm or shivering and vasoconstriction when the body is too cold. It responds to bodily substances.
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What is the difference between active and passive transport?
A. Active transport can only move SMALL molecules.
B. Active transport does NOT use energy.
C. Active transport uses DIFFUSION to move molecules across the cell membrane.
D. Active transport USES energy.
how does the second law of thermodynamics help explain the diffusion of a substance across a membrane?
The second law is the trend toward randomization, or increasing entropy.
Second law allows for diffusion because diffusion is an increase in entropy .Diffusion is the process of movement of molecule down the concentration gradient until they doesn't exist . This movement represents an increase in the entropy.
Second Law of Thermodynamics state that molecules will spontaneously move towards an area of lower concentration, from an area of higher concentration. Molecule are capable to travel across cell membranes known as lipophilic molecules as they dissolve in the lipid bilayer. Movement represents an increase in the entropy or disorder in the system .
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PLEASE HELPPPPP
Identify the process that occurs in this organelle, and explain the importance of this process to the survival
of organisms.
Answer:
Explanation:
its c
what is the most important negative effect of exposure to uv radiation in terms of reproductive success?
Exposure UV radiation have a high negative effect on reproductive success.
On live cells, ultraviolet light has several detrimental effects. A living cell exposed to UV light for an extended period of time frequently experiences changes in how the cell works as well as gene changes that result in cancer.
Sometimes, if it comes into touch with human skin, it usually results in rashes, ulcers, itching, burning, and redness.
What is reproductive success?
The number of offspring a person produces during a breeding event or lifetime is referred to as reproductive success. This is not constrained by the quantity of offspring one individual produces, but also by the ability of these offspring to reproduce.
What are UV radiations?
The sun and artificial sources, such tanning beds, both emit ultraviolet (UV) radiation, a type of non-ionizing radiation.
UV radiation overexposure can cause major health problems,
However, if it comes into touch with the skin for a long time and in high doses, skin cancer will result.
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Besides the supinator, which other muscle is a powerful supinator of the forearm?.
Besides the supinator, the other muscle that is a powerful supinator of the forearm is: the biceps brachii. The biceps brachii is responsible for elbow flexion and forearm supination.
What is the biceps brachii?The biceps brachii is a large, thick muscle on the front of our upper arm that is located between the shoulder and the elbow. This muscle often looks like a horseshoe shape. The biceps brachii’s primary function is as an extension of the elbow joint.
While the biceps are located on the front upper arm, there are other muscles known as the triceps on the back of the upper arm, which are responsible for arm extension.
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what are the similarities and differences you observe between the anatomy of the sheep brain and the anatomy of the human brain? what structures were you able to visualize over the course of the dissection?
Similarities and differences between sheep and Human brain:
Similarities:
The sheep brain is similar to the human brain in having two brain stems, two optic nerves and two hemispheres.
Differences:
Compared to a sheep's brain, the human brain is larger and heavier. In comparison to the human brain, the olfactory bulb is more developed in the sheep's brain. The shape of the sheep's brain is elongated, whereas the human brain is spherical. The frontal lobe of the human brain is bigger than that of the sheep's brain. The main distinction between the human and sheep brains is that humans can use their brains to think, innovate, but sheep cannot.
Over the course of dissection structures visualizes include; cerebrum, cerebellum, brain stem, Hypothalamus, Pituitary gland, Pineal gland, Thalamus etc.
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the endangered species act is considered one of the strongest environmental law because it: a. mandates the listing of species that are endangered b. it develops a procedure that must be followed for a species to be listed c. it requires that habitat of listed species be protected d. it requires that all countries of the world acknowledge species listed as endangered e. it requires that migratory species habitat be protected in both countries that the species are found in (breeding grounds country and overwintering countries)
The endangered species Act is considered one of rhe strongest environmental law because option D: it requires that all countries of the world acknowledge species listed as endangered.
The U.S. Fish and Wildlife Service and/or the NOAA Fisheries Service must be consulted by federal agencies to ensure that any actions they authorise, fund, or carry out are not likely to endanger the existence of any listed species or cause the destruction or adverse modification of any designated critical habitat of such species, according to the law. As a result, option D is the best one.
The law forbids any activity that results in the "taking" of any listed endangered fish or wildlife species. Similar restrictions apply to the import, export, interstate, and international trade of the species listed.
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rna viruses that infect animal cells always encode the enzymes needed to replicate their genomes because
Because host cells usually lack the appropriate enzymes, RNA Virus always encodes the enzymes needed to copy its genome.
Classification of Viruses Based on Nucleic Acid Type
Some viruses are classified based on the type of nucleic acid, including:
1. DNA viruses
DNA viruses are viruses in which the nucleic acid is DNA, for example parvovirus.
2. RNA viruses
RNA viruses are viruses in which the nucleic acid content is RNA, for example picornavirus.
UNDERSTANDING VIRUS
The word "virus" comes from the Latin word virion, which means poison. The virus itself is always developing from time to time, so you can say it is very difficult to die or disappear. In fact, it is possible that new viruses will appear which can sometimes make humans or other living things sick.
Viruses are part of microorganisms. Named part of microorganisms because they are living things with a size of only a few microns or maybe smaller than that, because 1 micron is equal to 0.001 mm. Based on the above understanding of viruses, it can be said that viruses are parasitic organisms, which require a host to survive. These microorganisms must find a host to reproduce, including through human cells.
Without hitching a ride onto its host's body, it cannot self-replicate. Some species of these organisms can even kill their host cells in order to reproduce. If it does not find a host, the virus cannot live for very long.
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What would be a good title for the graph? Pls help due today
Summarize Your Data in Plain English.
Left Justify Chart Captions Below Figure.
Keep Chart Captions Simple and Short.
Simplify Your Information.
Include Units of Representation.
Don't Forget Time Period!
A sequence of biotic changes that regenerate or create an ecological community is known as?.
A sequence of biotic changes that regenerate or create an ecological community is known as Succession.
Ecological succession is the gradual evolution of a community's constituent species over time. The process by which a region's species and habitat mix evolves over time is called ecological succession. These communities gradually replace one another until a "climax community" is attained, such as a mature forest, or until a disruption, such as a fire, happens. A key idea in ecology is ecological succession.
Nudation, Invasion, Competition and Co-action, Reaction, and Climax or Stabilization are the five stages of succession. At the same location, a succession of biotic communities organically emerge one after another until the Climax stage is reached. In their early stages, biotic communities evolve slowly.
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when sexual hormone production increases, bone growth a. accelerates rapidly; b. increases, but only in thickness; c. increases slowly; d. is not affected.
When sexual hormone production increases, bone growth accelerates rapidly.
What are sexual hormones?
Sex hormones are steroid hormones that interact with vertebrate steroid hormone receptors. They are also known as sex steroids, gonadocorticoids, and gonadal steroids. Androgens, estrogens, and progestogens are among the sex hormones . Their effects are mediated by both fast nongenomic mechanisms through membrane-associated receptors and signaling cascades as well as by slow genomic mechanisms through nuclear receptors. Although they serve significant sex-related roles, the polypeptide hormones luteinizing hormone, follicle-stimulating hormone, and gonadotropin-releasing hormone—all of which are connected to the gonadotropin axis—are typically not regarded as sex hormones.
Hence, sexual hormone production increases, bone growth accelerates rapidly.
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which human skeletal muscle fiber has the highest oxidative capacity? select one: a. type iia b. type iib c. type i
Human skeletal muscle fiber has the highest oxidative capacity is type I.
Human skeletal muscle fibers are divided into 3 types of muscle fibers:Type I (slow twitch oxidative): This type of muscle fiber contains large amounts of oxidative enzymes large, which contract slowly and release energy gradually the needs required by the body in a state of activity.Type IIa (fast-twitch oxidative): This type of muscle fibers contracts quickly and release energy quickly, this is due to this type of muscle fibers containing more sarcoplasmic reticulum so that they are faster in releasing and taking back calcium ions, the structure of the myosin head is also slightly different than slow type muscle fibers causing muscle fibers it is more efficient at hydrolyzing ATP. Type IIb (fast twitch glycolytic): This type of fiber is the same as type IIa, the difference is that type IIb does not require oxygen while type IIa requires oxygen.Learn more about 3 types of muscle fibers here https://brainly.com/question/16951957
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what results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction? view available hint(s)for part a what results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction? a deletion a nondisjunction an inversion a translocation polyploidy
Inversion results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction.
So, the correct option is C.
An inverted DNA sequence is one that has been broken off from a chromosome, reversed against the native genetic sequence that was previously present in the genome, and then reattached. It leads to the chromosomal anomaly known as inversion. A chromosome breaks in two places and the resultant piece of DNA is reversed and reinserted into the chromosome. This is known as an inversion. The chromosomal breaks might result in the loss or gain of genetic material.
A chromosomal inversion is a rearrangement in which one end of a chromosome is flipped from the other. When a single chromosome breaks and rearranges itself, it results in an inversion. Paracentric and pericentric inversions are the two sorts.
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all of the following occur during mitosis except a.the coiling of chromosomes. b.the formation of a spindle. c.the synthesis of dna. d.the degradation of the nuclear envelope.
The Synthesis of DNA do not occur during mitosis .
Mitosis is the process through which a mobile replicates its chromosomes and then segregates them, producing identical nuclei in coaching for cellular department. Mitosis is usually followed with the aid of equal department of the mobile's content into daughter cells which have equal genomes.
At some point of mitosis, a cell duplicates all of its contents, which includes its chromosomes, and splits to form identical daughter cells. because this procedure is so critical, the stairs of mitosis are cautiously controlled with the aid of certain genes.
It's far crucial that the daughter cells have a duplicate of each chromosome, so the procedure entails copying the chromosomes first after which cautiously isolating the copies to present each new cell a full set, before mitosis, the chromosomes are copied.
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ellie may, a mother with type b blood, has a child with type o blood. she claims that jethro, who has type a blood, is the father. he claims that he cannot possibly be the father. further, blood tests ordered by maury povich reveal that the father is homozygous. judge joe brown rules that:
In addition, Maury povich's blood tests show that the father is homozygous. The Jerry Springer show should be called, according to judge Joe Brown, who agrees with Jethro.
What is often examined during a blood test?Blood tests are frequently performed. Find out how well-functioning organs like your kidneys, liver, heart, or thyroid are, as directed by healthcare professionals. aid in the diagnosis of illnesses like HIV/AIDS, diabetes, coronary heart disease, and cancer.
What activities are prohibited prior to a blood test?Avoiding certain meals and beverages, such as alcohol, grilled meats, and herbal tea. avoiding overindulging the day before a test. not a smoker. avoiding certain actions, such as engaging in sexual activity or hard exercise.
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which would be the route taken by lymph traveling from lymphatic vessels in the right leg to the bloodstream?
The left subclavian vein; the right lumbar trunk; the cisterna chyli; and the thoracic duct. blood from lymph system in the right leg.
What does the body's lymph do?Lymph: The excess fluid that leaks out of cells and tissues but is not recycled back into capillaries is what is referred to as lymph, also known as lymphatic fluid.
Lymph node cancer?A tumor of the lymph system, which is a component of the body's defense against infection, is lymphoma. The spleen, thymus gland, lymph (lymph glands), and bone marrow are all components of the lymphatic system. All of those locations, in addition to other organs in the body, can be impacted by lymphoma.
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