Would the correct answer be A
The frog has two openings at the poster of its body whether it is a male or a female. The two openings are the anus and the cloaca or the cloacal opening. The function of the anus is to get rid of the undigested food and faeces by the process of defeacation. The cloacal opening has two functions as it is related to the urinary system and the reproductive system. It functions as a urinary opening and a reproductive opening.
<span>It has to be made bioavailable by cyanobacteria. This process is called "nitrogen fixation" and involves the conversion of atmospheric nitrogen (N2) into ammonia (NH3). This means that the nitrogen is reduced, in chemical terms.</span>
<span>The cell membrane is one of the great multi-taskers of biology. It provides structure for the cell, protects cytosolic contents from the environment, and allows cells to act as specialized units. A membrane is the cell’s interface with the rest of the world - it’s gatekeeper, if you will. This phospholipid bilayer determines what molecules can move into or out of the cell, and so is in large part responsible for maintaining the delicate homeostasis of each cell.</span>