Which gland sits atop each kidney?
a. adrenal
b. thymus
c. pituitary
d. pancreas

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere

Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of