Explain how malaria and sickle cell anemia are selection pressures that stabilize the sickle cell allele frequency in a population

Sickle cell anemia is a homozygous recessive disorder. This means, in order to have sickle cell anemia, you must have two copies of the recessive allele (aa). Sickle cell anemia can be a lethal disease if proper treatment is not available.

Malaria is a disease that kills hundreds of thousands of people every year. More people die from malaria than sickle cell anemia worldwide. In malaria infested countries, those people who are carriers of the sickle cell allele (Aa) are provided a resistance to malaria, and therefore, are more likely to survive

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation:

tissue

explanation:

it is actually formed by geoup of cells which is tissue