a tree is an example of (an)?
a. chemotroph
b. scavenger
c. autotroph
d. heterotroph

Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

What is the term for the two sets of chromatids formed in the parent cell a. haploid b. diploid c. gamete d. tetrad