Codons join with a structure called the ___________________________.

Answer:

1. Recognition of foreign molecules - Defense

2. Receptors of extracellular signals - Regulation

Explanation:

Populations in Hardy-Weinberg equilibrium express the same allelic and genotypic frequencies through generations. Number of individuals expressing each phenotype: 63 sheep S^AS^A, 84 sheep S^AS^B, 28 sheep S^BS^B.

The Hardy-Weinberg equilibrium theory states that allelic and genotypic frequencies in populations that is in equilibrium remain the same through generations. No evolutive forces are acting on these populations, so no evolution occurs.

Assuming a diallelic gene,

Allelic frequencies

Genotypic frequencies

The addition of the allelic frequencies equals 1

p + q = 1.

The sum of genotypic frequencies equals 1

p² + 2pq + q² = 1

In the exposed example,

Alleles          Frequencies

Genotypes

We need to get the number of animals expressing each genotype and phenotype. To do it, we just need to use allelic frequencies and calculate  genotypic frequencies (p², 2pq, and q²), and then multiply these values by the total number of animals (N = 175).

Genotypic and Phenotypic frequencies

F(S^AS^A) = p² = 0.6² = 0.36

F(S^AS^B) = 2pq = 2 x 0.6 x 0.4 = 0.48

F(S^BS^B) = q² = 0.4² = 0.16

Number of individuals expressing each phenotype

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Complete question

A single gene with two alleles control variation in haemoglobin type in sheep. There are three different phenotypes corresponding to genotypes

In a flock of 175 sheep the frequency of allele S^A was found to be 0.6 and frequency of allele S^B WAS found to be 0.4.

Using the hardy weinberg equation calculate the number of sheep with each phenotypes in the flock show your working

Answer:

what's the options???????????????

Answer:

Explanation:

They will differ because MHC molecules of the donor may stimulate rejection of the graft tissue as opposed to a receiver rejecting it in an immune response. That is because the MHC molecules are a group of genes that code for proteins found on the surfaces of cells that help the immune system recognize foreign substances and the surfaces are what is being transplanted during a tissue graft, meaning they are the ones that will ultimately reject the tissue graft operation.

Answer: Third Option: Top

First Option: Top Right

Second Option: Right Middle

Last/Fourth Option: Bottom

Explanation:

Answer:

1st one is top right

2nd one is right, directly across from the full moon

3rd one is bottom

4th one is top

Explanation:

It is just a cycle of the moon you can see the way it goes with the shadows.

Based on the information, we can infer that the measurement that could be the least probable is caudal peduncie depth strandard error. Also, the trend is for lake values to be higher than river values.

To identify the values we must analyze the table and identify they are not the trends. In this case we can infer that the tendency is for the values of the lake to be higher than the values of the river because all the values of the lake are higher than those of the river.

On the other hand, we can infer that the value that could be the least successful is the peduncie depth strandard error because it shows equal values. However, if we take into account the previous values, it should not be the same in both cases.

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Answer:

Prophase? :3

Explanation:

:3

Answer:

some products of photosynthesis are carbon,hydrogen,oxygen,glucose

A few techniques that can be used to anchor aquarium plants in substrate for healthy growth includes; Tieing the plant to a rock or piece of driftwood, Using plant weights, Planting the plant in a pot and Using aquarium glue.

Tying the plant to a rock or piece of driftwood: This method works great for plants with rhizomes, like Anubias and Java Fern, as you mentioned.

Planting the plant in a pot: Some plants can do well when planted in pots with their preferred substrate. This is good because it is in a controlled enviroment and you can move plant without disturbing the plant.

plant weights: This method is said to be okay for buoyant plants that tend to float away before their roots can establish. However this can be disadvantagous if the weight is made with lead.

aquarium glue: This can be very effective for certain types of plants. It's important to use a glue that is safe for aquarium use (i.e., cyanoacrylate-based glues).

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A tiny electric message moves through a long part of a brain cell called the axon. When a message goes to the end of a nerve, it sends chemicals called neurotransmitters. These substances move through a tiny gap and attach to special parts of another nerve cell's outer covering.

Messages called impulses are sent from one nerve cell to another through a connection called a synapse. This process is called synaptic transmission. Synapses are connections between nerve cells or between nerve cells and other cells, like muscles or glands.

The neuron sending the signal is called the presynaptic neuron. When a signal travels down a nerve cell, it causes little sacs called vesicles to release chemicals called neurotransmitters.

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Answer:

Chloroplast

Explanation:

Chloroplast, structure within the cells of plants and green algae that is the site of photosynthesis, the process by which light energy is converted to chemical energy, resulting in the production of oxygen and energy-rich organic compounds. Photosynthetic cyanobacteria are free-living close relatives of chloroplasts; endosymbiotic theory posits that chloroplasts and mitochondria (energy-producing organelles in eukaryotic cells) are descended from such organisms.

Source: Britannica

Chloroplast organelle is affected by mosaic viruses

Lauren suffers from cystic fibrosis. Her body is unable to regulate the movement of salt through her cells. When Lauren attempts to work out, she experiences wheezing and coughing. She gets breathing treatments that enable her to dance, sing, and swim.

It is frequently referred to as a fluid mosaic because the cell membrane is made up of so many different kinds of molecules, many of which float along the lipids. The lipid bilayer, which floats along the lipids because the cell is made up of so many different kinds of molecules, is the liquid portion.

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1. If the individual with the dominant phenotype has an affected parent with a recessive phenotype.

2. If the individual with the dominant phenotype has affected offspring with a recessive phenotype.

In a pedigree, two situations can help determine the genotype of an individual with a dominant phenotype.

1. If an individual with the dominant phenotype has offspring with a recessive phenotype, it indicates that the individual must be heterozygous (carrying one dominant and one recessive allele).

This conclusion is drawn because the recessive phenotype can only be expressed when an individual has two copies of the recessive allele.

2. Another situation is when both parents have the dominant phenotype, but they produce offspring with the recessive phenotype.

This scenario suggests that both parents are heterozygous (carrying one dominant and one recessive allele), and the recessive phenotype appears in their offspring due to the inheritance of two recessive alleles.

By analyzing these patterns in the pedigree, we can make inferences about the genotype of individuals exhibiting dominant phenotypes.

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Explanation:

Explanation:

The vertebrate forelimb of human, bird, and bat may not appear to have much in common, but a closer examination of the anatomy shows that the same bones were applied to a variety of different jobs in each of these species. Evolution doesn't plan ahead. It can only work with what's available. The color coding shows the way the bony elements were modified in each species. You might think that the two wings would be more similar in design because of the job they do but, in fact, the bird wing and human arm are more similar on the interior. However, the bird "hand" is reduced, whereas the bat and human hand have more in common. See if you can find a similar image of a dolphin or whale flipper for another comparison.

Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes species to change and diverge over time.

Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor. These structures may or may not have the same function in the descendants. Figure \(\PageIndex{3}\) shows the upper appendages of several different mammals. They all have the same basic pattern of bones, although they now have different functions. All of these mammals inherited this basic bone pattern from a common ancestor.

Answer: An autotroph is an organism that can produce its own food(using light), water, and carbon dioxide

Answer:

Blue Ink patches are observed on the leaves of the plant. Also, on cutting across the stem of the plant, the red color of the solution is found along the length of the stem.

The above observation shows that the stem of the plant conducts water through its length to the leaves of the plant.

Explanation:

The leaves of plant obtain water and minerals from the soil through the roots of the plant. The water is conducted by the stem of the plant from the roots to the leaves of the plant where they are needed for photosynthesis as well as for cooling the plant. The xylem tissue in plants is responsible for conducting water to the leaves of the plant from the roots of the plant through the stem.

The conduction of water from the roots to the leaves of the plant is maintained by capillary action as well as by transpiration pull. Transpiration pull refers to the pull of water by the transpiration action taking place in the leaves of the pant, whereby water evaporates from the leaves of the plant through the opening in the leaf of the plant.

When the blue ink is added to the water, the colored water is conducted through the stem of the plant to the leaves. On getting to the leaves, the water molecules evaporate leaving behind the colored patches fond on the leaves. When the stem of the plant is cut, the blue color is seen along its length showing that the colored water was conducted through it.

Answer: a mutagens d carcinogens b point mutation c frameshift e missense f nonsense

Explanation: Hope that helps!

Answer : B

because that statement is wrong.

DESCRIPTION

The playful North American river otter is well adapted for semi-aquatic living. The mammals have thick, protective fur to help them keep warm while swimming in cold waters. They have short legs, webbed feet for faster swimming, and a long, narrow body and flattened head for streamlined movement in the water. A long, strong tail helps propels the otter through the water. They can stay underwater for as many as eight minutes. North American river otters have long whiskers, which they use to detect prey in dark or cloudy water, and clawed feet for grasping onto slippery prey. They are very flexible and can make sharp, sudden turns that help them catch fish. Their fur is dark brown over much of the body, and lighter brown on the belly and face. On land a river otter can run at speeds of up to 15 miles (24 kilometers) an hour—they can slide even faster. Their playful snow and mud sliding, tail chasing, water play, and snow burrowing activities also serve other purposes—they help strengthen social bonds and let young otters practice hunting techniques.

A river otter can grow three to four feet (0.9 to 1.2 meters) long including its tail and weigh between 11 and 30 pounds (5 to 14 kilograms). Males are generally larger than females. The tail makes up about a third of their total length.

RANGE

The North American river otter occurs in much of Canada and the United States, except for portions of the Southwest, and in Mexico in the Rio Grande and Colorado River delta areas. They can thrive in any water habitat, such as ponds, marshes, lakes, rivers, and estuaries—in cold, warm, or even high-elevation areas—as long as the habitat provides adequate food. River otter dens are along the water in abandoned burrows or empty hollows. The dens have entrances underwater so they can be easily accessed from the water. Bobcats, alligators, coyotes, raptors, and other large predators will sometimes prey on North American river otters.

DIET

River otters eat a variety of aquatic wildlife, such as fish, crayfish, crabs, frogs, birds’ eggs, birds and reptiles such as turtles. They have also been known to eat aquatic plants and to prey on other small mammals, such as muskrats or rabbits. They have a very high metabolism, so they need to eat frequently.

BEHAVIOR

River otters communicate with whistles, yelps, growls, and screams, as well as touch and body posture. They also scent mark using scent glands near the base of their tails that produce a strong, musky odor.

LIFE HISTORY

River otters breed in late winter or early spring. Adults generally give birth to between one and three pups, which are blind and helpless when born. They first learn to swim after about two months. River otters generally live alone or in small social groups. They can live eight to nine years in the wild but have lived up to 21 years in captivity.

CONSERVATION

North American river otters were hunted and trapped extensively for their fur in the 19th and 20th centuries, and are still hunted in some places. They were extirpated from portions of their range, but conservation and reintroduction efforts are helping populations to recover. However habitat destruction and water pollution still puts these animals at great risk, especially because they are so specialized.

FUN FACT

North American river otters can close their nostrils to keep water out during long dives.

Using things such as the internet. For example, if a scientist wanted feedback, he could turn to an org of other scientists across the globe and get their help.

Answer:

Explanation:

Scientists often communicate their research results in three general ways. One is to publish their results in peer-reviewed journals that can be ready by other scientists. Two is to present their results at national and international conferences where other scientists can listen to presentations

Answer:

412.5 Parts per million.

Explanation:

Based on preliminary analysis the global average atmospheric carbon dioxide in 2020 was 41 2.5 parts per million setting a new record high amount despite the economic slowdown.

Answer:

i think it is euless

Explanation:

not really sure but i have a feeling it is correct

Mass is measured by balance and weight is measured by balance.

Two pans are located on either side of a lever in the pan balancing scale. To achieve balance and determine the weight of the other thing, weights are placed on one side of the object and on the other side. Typically, the mass is expressed in grammes or kilogrammes.

Because of its practicality and accuracy, comparative weighing is frequently used to compare two things' masses rather than their absolute values. When preparing reagents and stock solutions, a top pan balance is typically used for rough weighing because minor weight differences do not significantly affect the outcome of analysis.

Two pans are integrated into this particular laboratory scale on either side of a lever. It has two separate applications. 

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When Thing 1: It has a mass measured by a pan balance. Thing 2: It takes the shape of a container. Then Both objects are matter statement is true.

Any substance with mass and which has volume is considered matter because it occupies space.

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Answer:

Explanation:

An intromittent organ is any external organ of a male organism that is specialized to deliver sperm during copulation. Intromittent organs are found most often in terrestrial species, as most non-mammalian aquatic species fertilize their eggs externally, although there are exceptions. For many species in the animal kingdom, the male intromittent organ is a hallmark characteristic of internal fertilization.

Answer:

potential

Explanation:

When a spring is compressed or stretched, potential energy is stored in them

Answer:

:)))

Explanation:

a and c i think sorry if im wrong

The author's belief is that Winslow Homer's paintings depict the exciting tension between the standard of thermodynamics and the human desire for control and stability.

Homer's use of nautical and outdoor settings, as well as welcome depictions of labor and industry, represent the conflict between everything in creation's energy and the human struggle to harness and hold it.

Winslow Homer's work was created all along the late 19th century, a time of excellent technological and modern progress in America. The nation was extending westward, and skill was a growing interest in the natural world and the allure of power.

Homer's paintings indicate this cultural circumstance, as well as welcome personal experiences as a journalist covering war during the Civil War.

Homer's paintings frequently depict nautical scenes, in the way that storms, shipwrecks, and fishing expeditions. He also commonly portrays labor and manufacturing, such as lumberers, miners, and ironworkers. The content of his paintings stresses the struggle between humans and character, as well as the desire for control and expertise over the environment.

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Answer:

6/16 Intermediate and dark ⇒ 2/16 OoDD + 4/16 OoDd

Explanation:

Due to technical problems, you will find the complete explanation in the attached files