Which type of selection is illustrated by these two graphs?

The answer is  DNA...messenger RNA...transfer RNA...Protein. RNA polymerase is responsible for the development of RNA (later spliced into mRNA) from DNA. mRNA then forms a complex with ribosome and tRNA to translate the mRNA into a polypeptide/protein. This flow is referred to as the central dogma.

Answer:

DNA -> messenger RNA -> transfer RNA -> protein is the answer

Explanation:

Answer:

Most animals that are not part of the same species cannot mate and have fertile eggs/babies. However there is some cases where this can happen. Such as a raccoon and cat. It is rare but possible.

Explanation:

The fur color change in Himalayan rabbits exposed to low temperatures is due to an environmental influence on the action of a temperature-sensitive gene product, with cooler temperatures allowing for pigment production in the extremities.

The fur of a Himalayan rabbit changes color after prolonged exposure to low temperature due to a temperature-sensitive gene product responsible for pigment production. This gene product, an allele for tyrosinase, is active only at lower temperatures, resulting in pigment being produced in the cooler parts of the rabbit's body, such as the ears, nose, and feet. In a cold environment, the extremities are colder, and thus more pigment is produced, leading to darker fur in these areas. Conversely, in warmer body areas or warmer climates, the enzyme is not as effective, and so the fur remains lighter.

Therefore, the change in fur color in the Himalayan rabbit due to low temperatures is most likely due to environmental influence on gene action. The gene is already present in the rabbit's genetic makeup, but its expression is influenced by environmental temperatures. This is why you would see a difference in fur coloration in rabbits living in different climates, such as the arctic versus the tropics.

The characters that are visible on the outer surface is called phenotype and the characters coded by the genes are called genotypes. The gene having the allele for the recessive and the dominant trait together is said to be heterozygous.

a) 9:16 b) 3:16 c) 3:16 d) 1:16 is the ratio of the genotypes of the offspring.

The alleles for the traits are given as:

See the attached image below for the Punnett square of the cross.

From the cross the ratios are:

Therefore, the genotype is 9:3:3:1.

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Final answer:

The student's question involves the genetic inheritance of unattached earlobes and cleft chin, both autosomal dominant traits. When heterozygous parents for both traits are crossed, four possible genotype combinations (FfBb, Ffbb, ffBb, ffbb) can result for their offspring, as determined by a Punnett square.

Explanation:

The student's question pertains to the inheritance of two autosomal dominant traits: unattached earlobes and a cleft chin. When parents are heterozygous for both traits, the possible genotype combinations of their offspring can be determined using a Punnett square. Let's denote unattached earlobes with the dominant allele F and attached earlobes with the recessive allele f. Similarly, we'll denote a cleft chin with the dominant allele B and no cleft chin with the recessive allele b. Since the parents are heterozygous for both traits, their genotypes are Ff and Bb, respectively. When we create a Punnett square for these two traits, each parent contributes one allele for each trait, resulting in a 1:1:1:1 ratio in the offspring with the following genotype possibilities: FfBb, Ffbb, ffBb, and ffbb.

Answer:

The correct answer would be a loss of sensation to pressure and touch.

The dorsal column-medial lemniscus pathway abbreviated as DCML refers to the sensory pathway of the central nervous system (CNS) which transmits sensations of vibration, fine touch, proprioception, and two-point discrimination from the skin as well as joints.  

Thus, injury to the dorsal column would result in the loss of sensation to touch and pressure.

Answer:

The answer is A: loss of sensation to pressure and touch

Explanation:

The gastrovascular cavity differs from the alimentary canal in that only the gastrovascular cavity has only a single opening

Explanation:

Both gastro vascular cavity and the alimentary canal are the digestive organs. They both have a sole difference. The gastro vascular cavity is a digestive organ that can be found only in the organisms with one openings like the Jelly fish, flat worms.

But the alimentary canal consists of a mouth in one end and an anus at the end to send away the excretion due to digestion. The alimentary canal is the organ of digestion found in birds, animals, birds. It helps to intake food, digest it, extract the nutrient and supply it to the other parts of the body and send the unwanted digestive products to the excretory system.

The gastrovascular cavity differs from the alimentary canal in that only the gastrovascular cavity has a single opening that serves both as a mouth and an anus. This type of digestive system is often referred to as an incomplete digestive system

Organisms with a gastrovascular cavity, such as hydras and jellyfish, use this cavity for both digestion and distribution of nutrients throughout their body. In contrast, an alimentary canal, which is present in organisms like nematodes, has two separate openings: a mouth for ingesting food and an anus for eliminating waste, making it a more complex and complete digestive system.

Different cells express different genes due to gene expression regulation, even though all cells have the same genetic information. This is achieved through the selective transcription and translation of DNA into proteins necessary for a cell's specific function.

All cells have the same genetic information, but do not express the same genes. This is possible because of gene expression, which can be turned on and off depending on the cell's function and needs. The correct answer to the question is option A: The differences are due to gene expression, which can be turned on and off.

Essentially, each somatic cell in the body contains the same DNA, but not every gene is expressed in every cell. Different cell types, such as those in the eye and liver, need different sets of proteins to perform their functions. Therefore, only a subset of proteins is expressed in a cell, requiring the DNA to be transcribed into RNA, which then gets translated into protein. The expression of specific genes is highly regulated, ensuring that only the necessary genes for a particular cell type are active at any given time. This differential gene expression is what leads to the various cell types in the body.

To further illustrate, cell differentiation is akin to actors reading from the same movie script but only performing their own parts. Cells contain the same full complement of DNA, but only 'read' the parts relevant to their function, resulting in unique genetic expression. This process of specialization makes different cell types distinct from one another despite having the same genetic information.

Answer:

A) be affected

Explanation:

Answer:

Explanation:

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The clumping or clouding of blood and blood serum is caused by the agglutination reaction, which happens when antibodies in the serum bind to antigens in the blood cells.

Clumping, or clouding, in the mixture of blood and the blood serum is most commonly caused by a reaction known as agglutination. This reaction occurs when antibodies present in the blood serum interact with antigens found on the surface of blood cells. When an antibody finds its corresponding antigen, it attaches to it and triggers a response that ultimately results in the clumping or clouding of the blood.

For example, during a blood transfusion, if the recipient's blood type and the donor's blood type are not compatible, the antibodies in the recipient's blood can cause the incoming blood to clump or cloud, leading to a serious health risk.

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The correct answer is The clumping or clouding in the mixture of blood and blood serum is caused by the presence of agglutinins in the serum reacting with antigens on the red blood cells.

When blood is mixed with blood serum, certain reactions can occur that lead to clumping or clouding of the mixture. This phenomenon is typically observed in blood typing procedures, such as the ABO blood group system. The clumping or clouding is due to a specific immune reaction known as agglutination.

Agglutination occurs when agglutinins, which are antibodies present in the serum, recognize and bind to antigens on the surface of red blood cells (RBCs). Antigens are specific molecules or structures on the cell surface that can elicit an immune response. In the context of blood typing:

When the wrong type of blood is mixed with incompatible serum, the agglutinins in the serum will bind to the antigens on the red blood cells, causing them to clump together, which is visible as clumping or clouding. This reaction is a critical factor in blood transfusion compatibility and is the basis for determining a person's blood type and ensuring that transfused blood does not cause a dangerous immune reaction in the recipient.

The complete question is:

"clumping" or "clouding" in the mixture of the blood and the blood serum is caused by ________.

Answer:

Outer Core

Explanation:

APEX

The Earth's structure can be divided into several layers: the crust, the mantle, the outer core, and the inner core. The layer just below the lower mantle is the outer core.

Layers of the Earth:

Crust:

Mantle:

Outer Core:

Inner Core:

Thus, the layer below the lower mantle is the outer core.

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Answer:

The correct answer is option B, that is, Edwin Hubble.

Explanation:

Edwin Hubble who lived within 1889-1953 is an American astronomer, who completed his studies from the University of Chicago. He discovered that nebulae are the galaxies and postulated the Hubble's law on the basis of which the universe is expanding.  

According to him, the galaxies are going away from each other, and also stated that the distance of a galaxy is equivalent to its recessional speed.  

PRE

1.) the inability of red and purple

sea urchins to mate due to

gametic incompatibility

3.)different mating calls for two

different grasshopper species

POST

4.)the death of a zygote after

few weeks of formation

2.)a sterile zonkey formed from

the mating of a donkey and

a zebra

The correct option is  A) i.e. used as a solvent lost during transpiration.

Most of the water taken up by a plant is lost during transpiration, which involves the evaporation of water from plant tissues through the stomata in the leaves.

The situation in which allele frequencies in the gene pool of a population remain constant is called genetic equilibrium or Hardy-Weinberg equilibrium.

This concept is based on the Hardy-Weinberg principle, which describes the relationship between allele frequencies and genotype frequencies in an idealized population under certain conditions. In order for a population to be in genetic equilibrium, the following conditions must be met:

No mutations: The allele frequencies remain constant in the absence of new mutations.

Random mating: Individuals in the population mate randomly, without any preference for specific genotypes or phenotypes.

No gene flow: There is no migration of individuals or genetic material between populations, preventing the introduction or loss of alleles.

No genetic drift: The population is large enough that random chance does not significantly impact allele frequencies.

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It prevents water evaporation.

100% correct

The waxy, transparent top layer of leaves is known as cuticle. It is a non-cellular protective covering found outside the epidermis of many plants. The cuticle functions by acting as a water permeability barrier that prevents excess water loss from the body of plants through evaporation. It also protects plant tissues by preventing the entry of microorganisms and external water.

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