Two people ( both heterozygotes are able to taste a chemical substance called ptc. the ability to taste ptc is caused by a dominant allele (t. the inability to taste ptc is caused by a recessive allele (t. what proportion of their offspring would be expected to be heterozygous?

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.

How does the nervous system affect the excretory system?

The biological classification of organisms is called taxonomy. based on your own investigation, discuss the importance of taxonomy in biological ?