Sam is a 2-year-old whose parents are worried that he isn't growing quickly enough. his pediatrician will most likely check:

The doctor will most likely check the functioning of the pituitary gland of Sam. The pituitary gland is responsible for the secretion of the growth hormone. The anterior lobe of the pituitary gland secretes the growth hormone which helps a person in his growth. Sam is not growing as well as he should. This might mean that there is something wrong with the function of the pituitary gland.

Hence, the answer is 'functioning of the pituitary gland'.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

answer by yourhope:

hi! : )

in which structure in the nucleus are ribosomes made?

b) nucleolus!

: )