Which of the following is an abiotic factor of a desert?
a. cactus
b. sand
c. lizards
d. wildflowers

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

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

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?