Dams are used to produce hydroelectric power. which of these best describes the impact of a dam on the environment?
a. it causes air pollution.
b. it reduces the level of groundwater.
c. it causes changes in the river ecosystem.
d. it reduces the level of oxygen in river water.

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.

Which organelle breaks down sugar molecules that supply energy to the cell ?

The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body