Answer: C.
Explanation: The kidneys do not have an effect on the exchange of oxygen and carbon dioxide with the tissues, that is a function of the lungs.
Answer:
4 layers
innermost - Mucosa - absorption/secretion
sub mucosa - secretory layer supports Mucosa
muscularis propria- smooth muscle layer move food down through the gut
Adventitia - primary functions are to restrain the vessel from excessive extension and recoil
A likely location for primary succession would be D. large boulder
<u>Primary succession begins on rock formations, such as volcanoes or mountains, or in a place with no organisms or soil.</u>
There are no rooted plants in the limnetic zone of the lake as well as the pond since the open water in where the rooted plants would not survive since it is muddy and phytoplankton are the only photosynthetic organisms.