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Answer:

The correct answer would be producers as they convert light energy to chemical energy by photosynthesis.

Explanation:

The food chain is a sequence of transfer of energy and food to one organism is consumed by the other.

Trophic level is the position or the place of organisms share in the food chain. Producers are the trophic level placed in the bottom of the food chain.

Producers (plants) convert light energy into chemical energy by the process of photosynthesis. This chemical energy transfer from one trophic level to another.  Producers provide food and energy to other trophic levels when they consume producer as their food. The green plants and blue-green algae are the examples of producer trophic level.

Thus, the correct answer would be producers.

Answer:

A heterozygous trait contains two different allelic forms of a gene in which one is a dominant allele and one is recessive allele. If there is a crossing between two plants that are heterozygous for their trait then the probability of expression of the dominant allele is 3/4.

So according to this question plants are heterozygous that means the genes would be like Pp and Pp. Here P indicates the purple color allele which is dominant and p indicates recessive white color allele.

Therefore cross between these two will give genotypes PP, Pp Pp, and pp. So according to the law of dominance that says dominant allele will express itself, therefore, probability of purple-flowered offspring is 3/4 because 3 out of four genotypes have the dominant allele.

Answer:

Aldosterone.

Explanation:

Aldosterone is a hormone that regulates the levels of sodium and potassium in our body, which leads to regulate our fluid levels.

In order to increase the fluids in our system, aldosterone causes the absorption of sodium from our kidneys. The kidneys are the place where our body filters the blood absorbing what it needs, such as sodium, and excreting the rest as urine. With the entering of sodium to our bloodstream, water also enters, increasing the volume of blood in our body.

Aldosterone is also responsible for the excretion of potassium into the urine, controlling the levels of this ion, which is extremely important for a high number of reactions.    

Answer: Immigration can be a reason for a overall increase in the population of a species. It is a method by which the species at other place migrate to a different place permanently. The reason to migrate to a different area can be lack of resources, hunting, or any natural calamities. The population of a particular geographical area shifts to another area only because of the problems that does not allows the population to reside there. This makes the population move to another area for their survival.

D. The immigration of the population is greater than the emigration.