Therefore, when the alleles of a particular gene are passed on to their descendants via gametes, a haploid sperm fertilizes a haploid egg producing a diploid zygote.
The process in which haploid gametes fuse to form diploid offspring:A diploid cell produces haploid cells during meiosis, and two haploid cells (gametes) combine during fertilization to create a diploid zygote.
Meiosis is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes, which results in the production of gametes, such as sperm or egg cells. Meiosis comprises two rounds of division, producing four cells with only one copy of each chromosome as a final product (haploid). Additionally, each chromosome undergoes genetic material cross-pollination between the paternal and maternal copies before division, resulting in novel combinations of the genetic code on each chromosome. The haploid cells created by meiosis between a man and a female will later unite during fertilization to create a cell with two copies of each chromosome once more, the zygote.
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1. Which of the following is a characteristic of a cartilaginous fish?
1 : dermal denticles
2 : external fertilization
3 :bilaterally flattened
According to the research, the correct option is 3. Bilaterally flattened is a characteristic of a cartilaginous fish.
What is a cartilaginous fish?They are a class of fish characterized by having dermal scales and with widened paired fins whose skeleton is made up of cartilage.
They have a hydrodynamic shape being bilaterally flattened, that is, they are flattened in the dorso-ventral axis, which allows them to do the constant movements necessary to propel those fish through the water and avoid sinking in the water.
Therefore, we can conclude that the correct option is 3. Bilaterally flattened is a characteristic of a cartilaginous fish.
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Which response is not associated with the successful use of a liquid disinfectant for the inactivation of a biohazard
Slow exhaust time setting is the response which is not associated with the successful use of a liquid disinfectant for the inactivation of a biohazard.
What is a Disinfectant?This is referred to a chemical substance which destroys or inactivates microbes on surfaces etc.
Its action is usually very fast and it having a slow response means its use wasn't a successful one as damages may have been done already.
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________ is a high-frequency transmission medium that has a single solid-copper core.
Coaxial cables refers to a high-frequency transmission medium that has a single solid-copper core which serves as the conductor in this type of substance.
What is a Conductor?These are elements which are usually metals and have unique properties such as high conductivity of electricity and heat. This helps for their transmission to be easier and faster due to the metallic properties.
Coaxial cables are high-frequency transmission medium that has a single solid-copper core which ensures that the signals are optimally moved from one point to another.
This is therefore the reason why it was chosen as the most appropriate choice.
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How might increased absorption of solar radiation by the atmosphere affect precipitation?
Select one:
O a. Increased absorption of solar radiation would not affect precipitation.
O b. Increased absorption of solar radiation might lead to more rain and freezing rain and
less sleet and snow.
O c. Increased absorption of solar radiation might lead to more sleet and snow and less
freezing rain and rain.
Od. Increased absorption of solar radiation would cause less precipitation.
increased absorption of solar radiation by the atmosphere can affect precipitation in increasing absorption of solar radiation can lead to more rain and freezing rain and less hail and snow.
B. Increased absorption of solar radiation can lead to more rain and freezing rain and less hail and snowWhat is absorption of solar radiation?Most of the absorption of solar radiation at wavelengths in the infrared range is due to water vapor and occurs in the troposphere, where most of the water vapor is located. This part of the absorption presents great variability due to the distribution of water vapor.
With this information, we can conclude that When solar radiation penetrates the Earth's atmosphere, it undergoes attenuation caused by reflection, scattering and absorption by atmospheric constituents.
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It's the year 2121. Thanks to the effects of pollution and nuclear war, aplysia californica have gone extinct. You're looking for a new model organism to study the dynamics of a reflex arc. Which ONE of the following organisms would be most ideal?
Answer choices:
The bloopy blurpus, consisting of one neuron and an iPhone battery
A carnivorous plant that uses an electrochemically controlled turgidity system to trap prey
Centron 63, featuring 7 openly accessible brains consisting of a 100 trillion neurons each
A man-sized hot dog creature that has 72 neurons
Yourself
Central 63, features 7 openly accessible brains consisting of 100 trillion neurons each
There are several "facts" about the human brain that neuroscientists have grown accustomed to: it has 100 billion neurons and 10- to 50-fold more glial cells than expected for its size; it makes up an astounding 20% of the entire body; it is the largest brain among primates and animals in general.
According to the researchers, any brain activity without L5p neurons must be unconscious as consciousness depends on these neurons. Nobody is certain how awareness, or the state of consciousness, and its contents, such as ideas and experiences, are related. Researchers have now put up a sophisticated solution: a direct structural connection. In the human brain, there are about 86 billion neurons.
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While watching the high school football game from the stands, Jeremiah notices a blurry figure in the corner of his eye go behind the concession stand. What best describes this phenomenon
The figure's picture activates Jeremiah's rods, producing a less-detailed image.
this phenomenon is due to rods and the cones.
What are rods and cones?Rods
In the retina, rods are a particular kind of photoreceptor cell. They help humans see well in low light because they are sensitive to light intensities.
Cones are 500–1,000 times more light-sensitive than rods.Peripheral vision is provided by these structures, which are concentrated in the retina's outer regions.Cones
In the retina, cones are a particular kind of photoreceptor cell. They enable us to see in color.
The macula, the region of our retina where cones are concentrated, helps us see small details.There are approximately 6 million cones and 120 million rods in the retina.To learn more about rods and cones with the help of the given link: https://brainly.com/question/18845566
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What did not occur in the hadean eon? a.) formation of the earth b.) meteor bombardment c.) formation of earliest solid rock d.) oxygen begins to appear in the atmosphere
Answe. No rocks on the Earth r:
Explanation:
the periodic table contains alot of information in it with the help of that information calculate the number neutrons present in the non metalic elements of the periodic table
The number of neutrons present in the non-metallic elements of the periodic table can be calculated by the formula:
No. of neutrons = Atomic mass - Atomic number
Every atom's nucleus has a neutron, with the exception of hydrogen, which does not. The fact that the particle has no electrical charge—it is neutral—gives it its name.
The elements that gain electrons to generate negative ions are known as non-metals. In their outermost shell, non-metals often have 4, 5, 6, or 7 electrons.
Example : Carbon, Nitrogen, Oxygen , Phosphorous etc.
Let's take an example of non metallic element like Phosphorous
Atomic number = 15
Atomic Mass = 31 u
So, according to the formula
No. of neutrons = 31 - 15 = 16
Hence, the number of neutrons present in the non-metallic elements of the periodic table can be calculated by the formula:
No. of neutrons = Atomic mass - Atomic number
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_____ is a gene silencing technique that is based on the fact that RNA molecules can fold into short, double-stranded regions where the base sequence is complementary.
RNAi is a gene silencing technique that is based on the fact that RNA molecules can fold into short, double-stranded regions where the base sequence is complementary.
What is the RNAi mechanism?A conserved biological response to double-stranded RNA, known as RNA interference (RNAi) or post-transcriptional gene silencing (PTGS), promotes resistance to both endogenous parasites and exogenous harmful nucleic acids and controls the expression of protein-coding genes. Small double-stranded RNA (dsRNA) molecules are used as triggers by most eukaryotic cells' RNA interference (RNAi) regulatory mechanisms to direct homology-dependent control of gene activity.
In order to protect plants from molecular parasites like viruses, RNA silencing has evolved. In controlling gene expression for growth and development, it is also helpful. These pathways interact with one another and generate short RNAs to function.
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Examine the picture below. 1. Draw out the segments of normal eukaryotic cell cycle. 2. What stage of the cell cycle is represented below? What is the percentage of cells in each stage of the cell cycle? What parts of the cell cycle are not present in the image? What is the percentage of cells that you cannot identify? Explain how you answered the question.
The two main phases of cell cycle are the interphase and the mitotic phase.
What is a cell cycle?Cell cycle is an ordered series of events that involve cell division producing two new daughter cells.The 2 phases of cell cycle are interphase (G1, S, G2) and mitotic phase (Prophase, Prometaphase, Metaphase, Anaphase, Telophase).During interphase, the cell grows in size and replication of DNA takes place. In G1 cell growth and protein synthesis occurs, in S phase DNA is replicated and in G2 there is further growth and protein synthesis. During Mitosis, nucleus divides and the duplicated chromosomes are distributed into daughter nuclei. Usually after mitosis, the cell will divide (Cytokinesis) which involves the division of cytoplasm and two daughter cells are formed.The following events occur during different phases of mitosis: Sister chromatids line up in a plane at the equatorial plate (Metaphase). Sister chromatids separate and move to opposite poles (Anaphase). The nucleus reforms (Telophase) and the cell divides.The given diagram represents Metaphase stage of cell cycle.
During metaphase, all of the chromosomes are aligned in a single plane at the equator (equatorial plane). During this phase the chromosomes are most condensed. The sister chromatids are joined to each other via the centromere.To calculate the percentage of cells during each stage, first count the number of cells in each phase. Then, divide the total number of cells in each phase by the total number of cells present and multiply by 100.
There are 28 cells in total.
Out of which 21 are in Metaphase and 7 cannot be identified.
Percentage of cells in metaphase= (21/28)* 100 = 75%
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The typical order for the major steps of enzyme isolation would be?
The typical order for the major steps of enzyme isolation would be
Homogenization, salt fractionation, column chromatography, Electrophoresis.Proteins called enzymes operate as natural catalysts for cellular non-spontaneous chemical events, starting and accelerating them. Despite their high turnover rates, they are picky and precise in their behavior.
Cell extract preparation, often known as cell lysis, is a stage of the capture phase. It entails liberating the cellular material from the host cells or tissue into an extraction buffer, producing the crude extract while preserving and stabilizing the target protein.The phenomenon known as "salting-out" occurs at very high ionic strengths, where protein solubility declines as ionic strength rises.As a result, salting out can be used to separate proteins according to how soluble they are in salt solutions.One of the most popular techniques for purifying enzymes is column chromatography. The foundation of chromatography is the idea that mixtures of molecules applied to surfaces or solids, and fluid stationary phases (stable phases), separate from one another while moving with the help of a mobile phase.Specific proteins in the blood can be measured using a test called protein electrophoresis. Based on their electrical charge, the test divides blood proteins into several groups.learn more about enzyme isolation here: https://brainly.com/question/22318217
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A group of biology students test the growth of bacteria under different conditions. the students apply the same amount of bacteria to identical petri dishes enriched with nutrients, then place each plate at a different temperature. the bacteria are allowed to grow for three days after which the number of bacterial colonies on each plate is counted. what is the dependent variable in this experiment?
I will leave your question unanswered. Thanks for the points I stole from you!
deja lo checo y te ayudo
Explanation:
después te ayudo
Frank was bitten by a rattlesnake and received anti-venom containing neutralizing antibodies. Frank received ________ immunity and he ________ long-term immunity as a result. Group of answer choices artificially acquired passive immunity; will not have naturally acquired passive immunity; will have artificially acquired passive immunity; will have naturally acquired active immunity; will not have
Frank was bitten by a rattlesnake and given anti-venom containing neutralizing antibodies. Frank will have acquired long-term artificially acquired passive immunity and active immunity naturally he will have as a result.
What is active immunity?Active immunity occurs when exposure to a diseased organism triggers the immune system to produce antibodies against that disease.
What is passive immunization?Passive immunization occurs when the body already receives the antibodies ready, instead of stimulating their production. The main difference is that, in passive immunization, the body does not produce memory cells, fighting the organisms only once.
With this information, we can conclude that Active immunity is when the individual's own body produces an immune response.
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Why did alexander fleming suspect he could get penicillin from a species of mold?
a. Wounds with superficial mold on the bandages were not becoming septic.
b. Bacteria on culture plates were unable to grow near mold contamination.
c. Soldiers eating moldy bread were not suffering from wound infections.
d. Patients infected with a fungus like, athlete's foot, were less likely to have bacterial infections.
e. Soldiers drinking fermented alcohol were less likely to have bacterial infections.
Answer:
b
Explanation:
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A nutrient that cannot be made within the body, or made in sufficient quantities is known as:________
a. a critical nutrient
b. a required nutrient
c. an indispensable nutrient
d. an essential nutrient
Those nutrients that cannot be made within the body or not in sufficient quantities are known as essential nutrients.
An essential nutrient is one that the body cannot generate on its own or cannot do so in sufficient amounts. These nutrients must be supplied from diet. These nutrients are necessary for growth and for the efficient functioning of the organism.
Proteins are used by the body to maintain and repair tissues so that they can grow and produce energy. All of the necessary amino acids are present in complete proteins and proteins with significant biological significance. Meat, eggs, milk, and soybeans are a few examples of such foods. Beans and peas, which are incomplete proteins, do not contain all of the required amino acids and must be coupled with other meals or with one another in a single meal to do so.
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PLEASE ANSWER QUICK
Who were the scientists that hypothesized that RNA was the first self-replicating information storage molecule that catalyzed the assembly of the first proteins?
Group of answer choices
Watson and Crick.
Cech and Altman.
Lerman and Urey.
Darwin and Pasteur.
Cech and Altman discovered the self-replication and biocatalytic properties of RNA. Option B.
What did Cech and Altman discover?
After several years of research, Cech and Altman discovered that, apart from being inheritable molecules and being involved in protein synthesis, RNA functions as a biocatalyst -just like enzymes- .
These scientists discovered that RNA shares with DNA the capability of transmitting genetic information and with proteins the capability of facilitating chemical reactions as a biocatalyst.
They could prove that,
RNA can self-replicate because it carries the genetic information needed to do it and does not need other proteins. It has a significant protagonism in cellular metabolism.
In the enzyme's and additional energy absence, the molecule can start its maturation process, catalyzing reactions by itself. Cech named this RNA form with enzymatic function ribozyme.
This was a significant discovery since it demonstrated that not only proteins were involved in biological reactions.
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In which step(s) did a chemical change most likely occur? investigation a, step 1 and investigation b, step 1 investigation a, step 2 and investigation b, step 2 investigation a, step 2 only investigation b, step 2 only
A chemical change must have occurred in investigation B step 2 because a change in color occurred.
What is a chemical change?A chemical change is said to occur when a new substance has been formed. The markers of the occurrence of a chemical change are signs such as;
Evolution of a gasAppearance of a solidChange of colorChange of temperatureNow a physical change does not involve the formation of a new substance. Physical change would always involve the change of a substance from one form to another such as the melting of ice.
As such, in looking our for the steps in which a chemical change occurred we must look out for the properties of a chemical change as mentioned above.
Now, a chemical change must have occurred in investigation B step 2 because a change in color occurred.
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Missing parts;
Investigations were carried out in a science lab to explore the topic of chemical and physical changes. Investigation A Step 1. Add 5 tsp. salt to 100 ml warm water and stir until most or all of the salt is no longer visible. Step 2. Heat the salt solution on a burner until only a white solid remains. Investigation B Step 1. Mix 10 tsp. white sugar into 100 ml water and stir until most or all of the sugar is no longer visible. Step 2. Heat the sugar solution on a burner until the solution thickens and turns brown. In which step(s) did a chemical change most likely occur?
The ______ and the ______ support the immune system by forming an important barrier against invading microorganisms.
The first line of barrier that support the immune system by the invading microorganisms is formed by the skin and the mucous membrane.
What is immune system?A network of biological processes called the immune system guards an organism against disease.
How do skin and mucous membrane support the immune system?The skin acts as the first line of defense and has specialized immune cells that help prevent the microorganisms from entering the body.
The mucous membrane which is more sensitive and lines up the internal organs of the body can sense and eliminate the microorganisms thus helping the immune system.
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How does sodium regulate the uptake of glucose into enterocytes?
Answer:
Sodium regulates the absorption of glucose by the enterocytes.
There are two basic types of transport systems for glucose:
- Sodium dependent glucose transporters (SGLTs)
- Glucose transporters (GLUTs)
Sodium is transported into cells actively by SGLTs, and glucose is transported into cells passively. The co-transport system's energy source are the sodium ions. In addition to other tissues, the GI brush-border membrane contains a very high number of SGLTs.
There are as many as 6 more related proteins, mostly expressed in the kidney, and at least 3 SGLTs (SGLT1-3) have been described from different species. The extracellular side of the SGLTs has both N and C terminal ends, totaling up to 15 transmembrane domains.
The GLUTs enable the diffusion of glucose, and some of them can also move other hexose carbohydrates. Due to amino acid sequences in the four hydrophilic domains of the 12 transmembrane domains, certain GLUT proteins are tissue-specific.
Describe the chemistry, major food sources, and roles of phospholipids and sterols
Phospholipids and sterols are very important for human diet.
Phospholipids are molecules connected to fat that include phosphorus, fatty acids, and a base that contains nitrogen. They have a glycerol backbone similar to triglycerides, but instead of three fatty acids, it is joined to two fatty acids and a phosphorus group. Phospholipids are crucial molecules since they make up a crucial part of cell membranes. They support the flexibility and lack of rigidity of organelle and cell membranes. As the majority of a cell's membrane, phospholipids are crucial for cells.Sterols have a distinctive four-ring structure with carbon and hydrogen atoms as its main building blocks. The most well-known sterol is cholesterol, which is essential for cell membrane formation and the building block of many significant chemicals in the body.learn more about Phospholipids and sterols here: https://brainly.com/question/1386854
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6. What type of energy do missiles have? b. Nuclear a. Chemical d. Thermal
Answer:
Explanation:
nuclear energy
Answer:nuclear
Explanation:
Some bacteria have been found to have much higher rates of mutation than other members of their population; they are termed "mutators." What do you think is the most likely reason for their higher rates of mutation?
Their DNA polymerase has compromised 3' to 5' exonuclease function.
PolymeraseAn enzyme that builds lengthy nucleic acid or polymer chains is called a polymerase. Using base-pairing interactions to copy a DNA template strand, DNA polymerase and RNA polymerase build DNA and RNA molecules, respectively, while half ladder replication builds DNA molecules.
For the polymerase chain reaction, a crucial molecular biology method, the thermophilic bacteria Thermus aquaticus' DNA polymerase is used. Template dependence or independence are two possible states for a polymerase. Template independent polymerase examples include poly-A-polymerase. Both template independent and dependent activity are known to exist for terminal deoxynucleotidyl transferase.
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What is the process of turning water into ice known as?
The process of turning water into ice is known as Condensation.
Condensation converts a substance from a gaseous state to a liquid form, frequently with a reduction in volume. It happens when a gas or vapour comes into touch with a surface that radiates heat, causing the gas or vapour to cool and solidify. Ice is the solidified version of water, which is a liquid. Condensation is the process by which water changes from the liquid phase (which is water) to the solid phase (which is ice).
Hence, The process of turning water into ice is known as Condensation.
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Select the correct answer from each drop-down menu.
The tool in the photograph is a
. It is used for
Answer:
going to the earth surface
Answer:
satellite, traveling in space
Explanation:
Which nutrient transports, dissolves, and reacts with chemicals; provides lubrication and shock protection; and aids in temperature regulation?
Water is the nutrient that transports, dissolves, and reacts with chemicals; provides lubrication and shock protection; and aids in temperature regulation.
What is the importance of water?Water is a substance (of molecular formula H₂O) found at room temperature and pressure as a clear liquid.
It is present naturally as rain, and found in rivers, lakes and seas; its solid form is ice and its gaseous form is steam.
However, water is a major requirement by living organisms as it plays several pivotal roles in the body.
Water as a nutrient helps in the transportation dissolution and reaction with chemicals. It provides lubrication and shock protection; and aids in temperature regulation.
The water in the body has an important role as a thermoregulator, regulating the overall body temperature by helping dissipate heat. If the body becomes too hot, water is lost through sweat and the evaporation of this sweat from the skin surface removes heat from the body.
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Name of process whi ch can increase the rate of dissolving waterr in salt
Agitation and stirring will increase the rate of dissolving water in salt.
What is agitation and stirring?Agitation:
A fluid is agitated when it is made to flow mechanically through a vessel in a certain pattern, such as a circulatory one. The process of agitating a mixture involves the movement of one or more of its constituent parts to enhance contact. A liquid's usual properties will change as a result of vigorous agitation, especially with water, which reduces the liquid's aggregation.
Stirring:
To stir is to continually or repeatedly move one's hand through something (such a liquid or another substance) in order to cool, mix, agitate, dissolve, etc. any or all of the component parts: to use a spoon to stir your coffee.
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According to grime, which strategy is followed by stress-tolerant species?
According to grime, the S strategy is followed by stress-tolerant species.
For plants especially, Grime created a life-history model. Grime categorized factors that restrict plant biomass or productivity in this model in the ways shown as follows. Any condition is known as stress limits plant growth. Examples include a lack of nutrients, water, light, or a low temperature. A disturbance is the partial or complete loss of plant biomass brought on by herbivores, pathogens, or human activity, as well as by environmental variables such as wind, frost, desiccation, soil erosion, or fire. The propensity of nearby plants to share the same amount of space, water molecule, ion of mineral nutrient, or quantum of light is known as competition. Numerous studies have demonstrated that while competitiveness is significant under productive conditions, its significance diminishes as productivity increases.
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Cellular responses to hormones that initiate second-messenger systems include ________.
Cellular responses to hormones that initiate second-messenger systems include hormone binding to intracellular receptors.
When a cell is exposed to extracellular signaling molecules, or first messengers, second messengers, or intracellular signaling molecules, are released by the cell. Second messengers cause physiological alterations at the cellular level, including depolarization, migration, apoptosis, differentiation, and proliferation.Secondary messenger systems attach hormones to receptors, which sets off a series of events that result in actions. Secondary messengers are chemicals that transmit information from cell surface receptors to targets located in the cytoplasm or nucleus of the cell.learn more about second-messenger here: https://brainly.com/question/13910720
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If you suspect your culture of bacteria has 23 x 106 cells per mL, what would you want the final dilution to be in order to end up with 96 colonies of bacteria on a petri dish
The dilution factor in order to end up with 96 colonies of bacteria is 0.23 × [tex]10^6[/tex] .
For calculating the colony forming unit bacteria;
Colony-forming unit (CFU or cfu) is a measurement of live bacterial or fungi cells and is used to calculate the colony-forming unit of bacteria. CFU counts only viable cells as opposed to direct microscopic counts, which count all cells, both living and dead, using a hemocytometer. Colony-forming units per milliliter (CFU/mL) for liquids and colony-forming units per gram (CFU/g) for solids are used to indicate the results for convenience. The miles and Misra method can be used to compute CFU, which is helpful for assessing the microbiological load and severity of illness in blood and other samples.
∴ cfu/ml = (no. of colonies x dilution factor) / volume of culture plate
23 x [tex]10^6[/tex] cells per mL = 96 × dilution factor
Dilution factor = 23 ×[tex]10^6[/tex] / 96
Dilution factor = 0.23 × [tex]10^6[/tex]
Therefore, the dilution factor in order to end up with 96 colonies of bacteria is 0.23 × [tex]10^6[/tex] .
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Identify the cells and structures associated with the seminiferous tubule in this micrograph by clicking and dragging the labels to the correct location.
Seminiferous tubules are the specific site of sperm production, also known as spermatogenesis, and provides the necessary microenvironment to support this process. The micrograph parts shown in the First diagram are:
Seminiferous tubulesBasement MembraneSpermatogenic cellsSpermatogoniaSperm CellsInterstitial CellsThe second diagram shows:
Theca FolliculiiNucleusNucleolusZona PellucidaPrimary oocyteStratum GranulumPrimary FollicleGranulosa CellThe seminiferous tubule is lined by a complex stratified epithelium containing two distinct populations of cells, the spermatogenic cell that develops into spermatozoon, and the Sertoli cell that plays a supportive role.
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