A garden pea, whose chromosome number is fourteen, has
chromosomes within the egg cell.
1. 16
2. 7
3. 14

Answer:

True

Explanation:

This process of producing new cells is called cell reproduction

Answer:

67%

Explanation:

When taking random samples from a population, the observed numbers are not always as the expected ones. The difference is by chance, instead of 50% heter0zyg0us, the sample included 67%.  

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Available data:

-  Moths' color ⇒ diallelic gene

- f(G) 1960 = 0.8

- f(G) 1965 = 0.7

- f(G) 1970 = 0.6

- f(G) 1975 and 1980 = 0.5

-  1980 ⇒ N = 2000 pupae

-  Population in H-W equilibrium

Hardy-Weinberr equilibrium,  

In this problem we assume that the population is under H-W equilibrium, and we know that p = 0.5.

Considering that p + q = 1, then by clearing the equation, we get the value of q = 0.5    

Finally, we know that the genotypic frequency of the heter0zygous genotype is 2pq, so,

F(Gg) = 2pq = 2 x 0.5 x 0.5 = 0.5 = 50%

Now, among the options in the problem, there is not 50% but others. One of them, and the closest to 50%, is 67%.

The chart reflects that through the years, the moth's populations stabilized. Both alleles were favored, and their frequencies got to be equal to each other -0.5-. So there is a high probability of getting heter0zyg0us individuals in the population -50%-, more than any of the h0mzyg0us ones -25%-.  

However, in a natural population, the amount of h0m0zyg0us and heter0zygous individuals observed is not always the same as the expected ones. This fact happens especially when there are random samples.

In this experiment, the researcher took 2000 pupae, but they did not know their genotype. They just took them randomly. Even though the population is in H-W equilibrium, when sampling, the researcher took more heter0zyg0us individuals than the expected ones. It does not mean that the population is not under H-W equilibrium. It just means that by chance, more heter0zyg0us were selected.

So what you need to do in these situations, is to analyze your problem and the provided information, and think about the most feasible answer.

In this case, the expected number is 50% heter0zyg0us. The closest option is 67% and the most feasible. So that would be the answer.

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answer

prophase

interphase

steps

prophase

During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes.

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chromosomes become visible during interphase, which involves the first three stages of the cell cycle such as the G1, S, and G2 phases.

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Answer:

In active transport, a protein pump - powered by ATP energy - moves molecules from a low concentration to a high concentration against a concentration gradient

Explanation:

Diffusuion is the movement of molecules from a high concentration to a low concentration, and doesn't require energy because it is going with the concentration gradient. To move molecules against a concentration gradient from a low to a high concentration, it requires energy. This is called active transport.

Answer:

genotype variation

Explanation:

The abundance, rapid evolution, wide distribution, and unique characteristics of bacteria and microscopic organisms make them excellent index fossils for studying the geological history of the Earth.

A live being that is minuscule is one that cannot be seen with the ordinary eye. Microorganisms include, but are not limited to, bacteria, archaea, fungi, protists, and viruses.

Bacteria are prokaryotic, unicellular bacteria that inhabit practically all of Earth's habitats. They are distinguished by their relatively straightforward cellular architecture, lack of a real nucleus, and other membrane-bound organelles. Some types of bacteria can infect people, animals, and plants with diseases, and they play significant roles in the cycling of nutrients in ecosystems. Many bacteria, however, also have positive effects, such as those that aid in food digestion in the human stomach or those employed in biotechnology to create antibiotics, enzymes, and other valuable substances.

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The glomerulus is a unique high-pressure capillary bed in the kidneys. This filtration bed is considered high pressure due to the type of vessels feeding and draining it. The afferent arteriole feeding the glomerulus is larger in diameter than the efferent arteriole draining the bed.

This anatomical characteristic makes the blood entering the bed to be under high pressure and leaves the bed under lower pressure. This pressure differential between the two arterioles forces fluids and solutes through the walls of the capillaries and into the urinary tubules for further filtration. Therefore, the larger diameter of the afferent arteriole provides a higher volume of blood under higher pressure to the glomerulus, increasing the efficiency of the filtration. The smaller diameter of the efferent arteriole slows the blood flow, increasing the pressure inside the capillaries and maintaining the high pressure in the bed. This anatomical feature provides a unique and efficient filtration mechanism to the kidneys.

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complete question: The glomerulus is a unique high-pressure capillary bed, because the ______ arteriole feeding it is larger in diameter than the ______ arteriole draining the bed.

Answer:

The exocrine gland that is indicated by the arrow is the Liver.

Have a good day :)

Answer:

Liver

Explanation:

d )Yes, because everything impacts an environment, no matter how small.

One individual person can have an impact on their environment, whether positive or negative, through their actions and behaviors. For example, an individual person can reduce their water usage, recycle, or use public transportation, which can all have a positive impact on the environment.

On the other hand, an individual person can litter, use harmful chemicals, or drive a car that emits pollutants, which can have a negative impact on the environment. Every action, no matter how small, can contribute to the overall impact on the environment.

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When a large zone of no growth is found around an antibiotic disc being used for identification purposes, this means that the microbe is susceptible to the antibiotic.

The zone of no growth, also known as the zone of inhibition, is an area around the antibiotic disc where the bacteria are unable to grow. The larger the zone of inhibition, the more effective the antibiotic is against the bacteria.

Susceptibility testing is commonly used in clinical microbiology to determine which antibiotics will be effective against a particular strain of bacteria.

The test involves exposing the bacteria to different antibiotics and observing the zone of inhibition around each antibiotic disc.

If a large zone of inhibition is observed, it indicates that the bacteria are susceptible to the antibiotic and that it can be used for treatment.

Conversely, if there is little or no zone of inhibition, it suggests that the bacteria are resistant to the antibiotic and that an alternative treatment may be necessary.

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The absorption spectrum of a pigment is a graphical representation of the wavelengths of light that a pigment can absorb.

Pigments, such as chlorophyll or hemoglobin, are molecules that can absorb light energy and use it to carry out specific functions within cells.

When a pigment is exposed to a range of wavelengths of light, some of these wavelengths are absorbed by the pigment and others are transmitted or reflected. The absorption spectrum of a pigment is determined by measuring the amount of light that is absorbed by the pigment at each wavelength. The resulting graph shows the wavelengths of light that are absorbed by the pigment, as well as the intensity of absorption at each wavelength. The absorption spectrum of a pigment is important because it can provide information about the pigment's structure, function, and interactions with other molecules. For example, the absorption spectrum of chlorophyll shows that it absorbs strongly in the blue and red regions of the visible spectrum, but poorly in the green region. This is why plants appear green to us, as green light is not absorbed but rather is reflected by the chlorophyll.

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Answer:

They both relate the outcome of an experiment. A hypothesis is an guesstimate  of the outcome of an experiment, while the conclusion is the actual outcome.

Explanation:

Answer: It’s A for edgu 2021 topic test:)

Explanation:

Answer:

1. The car traveled 225km in 3 hours

2. It took him 3 hours to travel 12 km

Yes, water is a polar molecule because the Electrons are NOT shared EQUALLY

Answer:

Yes

Explanation:

Water is a polar molecule. Hope this helps.

The transfer of information from neuron to neuron takes place through the release of chemical substances into the space between the axon and the dendrites. These chemicals are called neurotransmitters, and the process is called neurotransmission.

The two options most likely affected by Mike's inability to produce enough testosterone are sperm production and the appearance of secondary sex characteristics, options B & D are correct.

Testosterone plays a crucial role in sperm production, influencing the development and maturation of sperm cells. Insufficient testosterone levels can lead to decreased sperm production and potentially affect fertility.

Testosterone is also responsible for the development of secondary sex characteristics in males. These characteristics include deepening of the voice, growth of facial and body hair, increased muscle mass, and changes in body shape. If Mike is unable to produce enough testosterone, these masculine features may be impaired or delayed, options B & D are correct.

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The complete question is:

Mike has a problem with his testosterone. He is unable to produce enough. Which will most likely be affected by his inability to produce testosterone? Select two options.

A) urine production

B) sperm production

C) producing fluid to help sperm move

D) appearance of secondary sex characteristics

E) egg production

F) egg movement to the uterus

All of them evolved from one rooted species, which colonized the islands only a few million years ago. This process, whereby species evolve rapidly to exploit empty eco-space, is known as adaptive radiation.

Homologous structures provide proof for a common origin, while analogous structures show that similar selective pressures can produce similar adaptations. Alikenesses and differences among biological molecules can be used to determine species' relatedness.

Thus, adaptive radiation is one of the reasons.

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The binding of the pre-initiation complex to the core promoter region occurs when the DNA is unwound and accessible.

This process is crucial for the initiation of transcription in eukaryotic cells. In transcription, genetic information from DNA is copied into RNA, which is essential for gene expression. The pre-initiation complex is a large assembly of various proteins, including RNA polymerase II and general transcription factors (TFs), that work together to ensure the accurate initiation of transcription.

The core promoter region is a specific DNA sequence found upstream of the gene that needs to be transcribed. It plays a critical role in directing the pre-initiation complex to the appropriate location on the DNA strand. The promoter region contains specific sequences recognized by the general transcription factors, such as the TATA box, which binds to the TATA-binding protein (TBP).

Before the pre-initiation complex can bind to the core promoter, the DNA must be unwound, making it accessible for protein binding. This unwinding is facilitated by various proteins, such as helicases and topoisomerases, that help to separate the double-stranded DNA into single strands. Once the DNA is unwound and accessible, the pre-initiation complex can bind to the core promoter region, allowing the RNA polymerase II to start the transcription process at the correct position on the DNA template.

In summary, the binding of the pre-initiation complex to the core promoter region occurs when the DNA is unwound and accessible, which enables the accurate initiation of transcription and subsequent gene expression.

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The hypothesis is most likely to be correct about the plasma membrane composition of an animal from the Mediterranean coast with one from the Mojave Desert is the cells from the Mediterranean coast animal will have more fluid plasma membranes (Option A).

Membrane fluidity is critical for cells, and temperature plays a significant role in regulating membrane fluidity. Animals residing in different habitats will have membrane composition adaptations to their particular environments. The plasma membrane of a cell is a selective barrier that allows certain things to pass through while preventing others.

The structure of the plasma membrane is a lipid bilayer, which means that it has two layers made up of different kinds of lipids. Because the lipids in the plasma membrane are constantly moving and changing, the membrane is sometimes referred to as a "fluid mosaic."

Therefore, the hypothesis that the cells from the Mediterranean coast animal will have more fluid plasma membranes is correct. The Mediterranean coast animal is more likely to have more fluid plasma membranes than the Mojave Desert animal since it requires more fluidity for life processes in an environment with high water availability.

Thus, the correct option is A.

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Natural selection favors better-camouflaged brown insects after the grass dies, leading to a change in color frequency. This exemplifies adaptation and evolutionary changes through environmental selection.

In a population of insects, there were two color variations: green and brown. One dry summer, all of the grass where the insects lived dried up and died. The probable outcome for insects in this situation would be a change in the population's color variation.

If there were green and brown variations of insects in a population, the brown variations might survive because they are better camouflaged against the brown dead grass.

Therefore, after the grass has died, the insects with the color variation that matches the new environment will have a better chance of survival and reproduction, leading to a change in the frequency of the traits in the population.

This is an example of natural selection, in which the environment selects the traits that are better suited to survival and reproduction, resulting in evolutionary changes over time.

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The main distinguishing factor between prokaryotes and eukaryotes is the presence or absence of a true nucleus, which contains the cell's genetic material.

Prokaryotes and eukaryotes are two types of cells with distinct differences in their structure and organization. Prokaryotes are single-celled organisms that lack a nucleus and other membrane-bound organelles, while eukaryotes are more complex and have a membrane-bound nucleus and various organelles that perform specific functions.

Additionally, prokaryotes are usually smaller in size and have circular DNA, while eukaryotes have larger cell sizes and linear DNA.

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Answer:

Answer is C

Explanation: Please MARK brainiest

Eukaroyote

Answer:

Answer is eukaryote.

Explanation:

A eukaryote is any organism whose cells have a cell nucleus and other organelles enclosed within membranes.

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Yes, these activities and body conditions affect blood pressure by changing either the blood volume or total peripheral resistance.

Peripheral resistance is the resistance to blood flow in the blood vessels that make up the circulatory system outside of the heart. This is usually caused by the blood vessel walls narrowing due to arteriosclerosis or other factors such as the thickness of the vessel walls. It can also be caused by increased blood pressure or an increase in the viscosity of the blood. Peripheral resistance can affect the rate of blood flow and cause problems such as hypertension. This can lead to complications such as stroke and heart attack. Treatments for peripheral resistance can include lifestyle changes such as exercise and diet, as well as medications and surgeries.

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Answer:

Energy is the ability to do work. ... The energy of the sun is first captured by producers (Figure below), organisms that can make their own food. Many producers make their own food through the process of photosynthesis. The "food" the producers make is the sugar, glucose.

Explanation:

hope this helps you :)

Answer:

Yes, a rat is considered a primary consumer. Primary consumers, also known as herbivores, are animals that eat plants as their main source of food. Rats are known to consume a variety of plant material, including seeds, fruits, and vegetables. In addition, rats are known to eat insects, which are also primary consumers, since they feed on plants. Therefore, as a consumer that feeds mainly on plant material, a rat can be classified as a primary consumer in a food chain or food web.

The number of stomata on entire leaf is 45780 stomata

Since the stomatal density is equal across a leaf that is 20cm² in size. If you count 46 stomata in a fov that is 2,009,600μm².

Since the stomatal density is equal across the leaf, we have that

number of stomata on leaf/area of leaf = number of stomata in fov/area of fov

Given that

So, the number of stomata on the leaf is given by

number of stomata on leaf = number of stomata in fov/area of fov × area of leaf

Substituting the values of the variables inbto the equation, we have

number of stomata on leaf = number of stomata in fov/area of fov × area of leaf

number of stomata on leaf = 46/2,009,600μm² × 20 × 10⁸ μm²

= 920/2,009,600μm² × 10⁸ μm²

= 0.000457803 × 10⁸ stomata

= 45780.3 stomata

≅ 45780 stomata

So, the number of stomata on entire leaf is 45780 stomata

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