Select the correct answer.
Based on these descriptions, which man is impotent?
Jacob has a low sperm count.
Reuben has a blocked vas deferens.
Leon is unable to sustain an erection.
Troy's testes have not descended into the scrotum.
СА.
Jacob
B.
Reuben
Leon
D.
Troy

Describe how alleles and genes are related

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

In which state was more than 100 billion tons of coal mined in 2005?