Which of the following is not a typical source of chemical weathering?
a. air
b. soil
c. water
d. plants ( it is not plants, i chose this and it was wrong)

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

If water is at -10 ° c and energy is added to the water until it is 50 ° c while maintaining a constant pressure of 760 mmhg, describe the phase change of the water?

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