The answer is:
B) The number of organisms of a species in a particular area.
Answer:
C
Explanation:
In the human body, the parasites multiply in the liver, and then infect red blood cells. The most common symptoms of malaria including fever, are caused when the parasites invade red blood cells (erythrocytes) and rupture.
Virus are made up of the core of genetic material. It could be DNA or RNA. Surrounded by a protein called capsid. Viruses can attach onto other host cells and get inside them and control them. They can also be surrounded by a spiky material called the envelop.<span />
B) oxygen
Respiration is defined as the movement of oxygen from the outside air to the cells within tissues
