Your body needs to make large molecules such as enzymes (proteins), body fat (lipids)and DNA (nucleic acids) to function properly. Where does your body get the elements to
make these large molecules?

Animals contribute to soil formation through decomposition of organic material. This statement is TRUE.

How does animals contribute to soil formation?

• Organic matter aids in decreasing compaction and surface crusting, enhances water infiltration into the soil, and acts as a reservoir for nutrients and water in the soil.

• Numerous techniques exist through which animals contribute significantly to the creation of soil.
• The decomposition of dead animals is one of them, and it provides the soil with organic material.
• Additionally, animals are able to improve the organic matter in the soil and fertilize it through the excretion of their excrement as well as the saliva of some species of animals, such as the goat, which is beneficial to the soil and plants.

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The correct answer is - True.

The animals are contributing a lot to the formation of soil, and they do this in multiple ways. One of those ways is the decomposition of the dead animals, which gives the soil a nice organic material. Also, the animals manage to increase the organic material in the soil and fertilize it through their feces, as well as through their saliva that can be very useful for the soil and the plants from some types of animals, like the goat.

Answer: The correct answer is - D) a red allele present on at least one of two homologous chromosomes (with genotype Rr).

Dominant trait (depicted by dominant allele, which is present in capital letter such as 'R' for red) is the one that masks the expression of recessive trait (depicted by small letter such as 'r' for white).

For a dominant trait to express, its genotype can be homozygous dominant ( that is having both the alleles as dominant RR) or heterozygous dominant (having both dominant and recessive allele such as Rr).

On the other hand, for a recessive trait to express, genotype must be homozygous recessive (such as rr for white flower).

In the given question, when a red flower (which could be Rr or RR genotype) is crossed with white flower (rr) and if it produces red flower, it will certainly have the heterozygous genotype that is Rr (as it will inherit 'R' allele from one parent and 'r' allele from another to become red flower).

Thus, a red allele (R) must be present on at least one of two homologous chromosomes.

Most enzyme-assisted reactions are reversible

Answer:

Decrease in cardiac output

Explanation:

Blood pressure may be defined as the pressure exerts by the artery on the walls during the blood flow. The systolic pressure is used for the calculation of the blood pressure.

The blood pressure depends upon the cardiac output, heart beats and rate of the blood flow. The cardiac output is the volume of blood pumped in the body per minute. The decrease in the cardiac output will ultimately results in the decrease in the blood pressure.

Thus, the correct answer is decrease in cardiac output.