Living material that makes up organisms is known as
a. detritus
b. biomass
c. trophic
d. organic

This connective tissue consists of large round densely packed cells with the nucleus pushed to one side.

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems

What kinds of foods are high in lipids?