A2
B4
C1
D3
I think sorry if I get one wrong
Answer:
a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
C) the lungs.
The air moves down the trachea and into the lungs where it is picked up by the blood
Answer:
A gene pool consists of all genes, including all the different alleles that are present in a population.
Explanation: