Plant and animal food sources have been improved by ____________________ for thousands of years. Fill in the blank(s) with the appropriate word(s)

Freshwater is most likely to become contaminated or polluted by ________ from urban and rural environments

Fill in the blank(s) with correct word

The function of RNA in the body is to store the genetic information in the nucleus.

Answer the following statement true (T) or false (F)

On your Spirit Blue plate, you see many dark blue colonies. These colonies...

a. do not produce lipase b.produce lipase c.hydrolize tributyrin d.a and b e. b and c

Natural killer (NK) cells are a type of:

A. Lymphocyte B. Helper Cell C. Monocyte D. Phagocyte