Answer:
I think It's the Answer B
Explanation:
Answer:
A. the heterozygote advantage
Explanation:
Heterozygote advantage is the condition where the heterozygous individual has higher relative fitness than both homozygous dominant and homozygous recessive individual. This means that the heterozygote individual has higher chances of surviving than both the homozygous counterparts. Sickle cell anemia is a recessive inherited disorder in which oxygen carrying hemoglobin has an abnormal structure. Hence, the resultant RBCs are not spherical but have crescent sickle shape. The oxygen carrying capacity of such RBCs is drastically reduced but they are unaffected by malarial parasite due to their abnormal structure.
- A person with both the recessive genes for sickle cell would not be able to survive due to insufficient oxygen transport in body.
- A person with both the dominant genes would be free of sickle cell anemia but in case of malaria would not be able to survive as the normal RBCs would be hijacked by the parasite.
- A hetrerozygote would survive both in malaria and sickle cell condition since he has enough normal RBCs for oxygen transport but also has sickle cell RBCs which are unaffected by malarial parasite.
Answer:
They are alike because they perform Voluntary and Involuntary Controls.
Explanation:
1). Skeletal muscle: The skeletal muscle brings about movement by pulling on the skeletal parts of which they are attached. This is the type of movement that is responsible for locomotion.
2). Smooth Muscle: This muscle is composed of elongated spindle-shaped cells which are grouped into bundles or sheets. They are least specialized muscle cells and are under the control of the autonomic nervous system.
3). Cardiac muscle: This muscle is only found in the walls of the heart. The muscle cells are branched and connected to one another by special discs. These cells helps the cells to contract and relax in unison so that the heart can pump rhythmically.
You're right, it is D.
A theory can be changed if evidence is found that contradicts the current theory.
