-All signal transduction cascades are shut down immediately so as to prevent the cell from mounting a response.
-Cells are unable to respond quickly to hormones, and therefore signal transduction cascades always occur over a long time.
-Cells have to be able to function alone, because they are unable to work together in a coordinated fashion.
-Cells often have to respond very quickly to changes in their internal and external environments.
The frequency of the sickle cell allele in areas where malaria is introduced will increase and it will be advantageous.
When a person is heterozygous for sickle cell anemia, it means it has one abnormal allele of the hemoglobin beta gene but doesn’t express the disease (like homozygous person).
On the other hand, a person heterozygotes for sickle-cell trait has a selective advantage in environments where malaria is present.
I believe A. binary fission
Answer:The Correct answer is D
Explanation: The Autonomic Nervous System is that part of Peripheral Nervous System that consists of motor neurons that controls the internal organs. The autonomic system controls muscles in the heart, the smooth muscle in internal organs such as the intestine, bladder, and uterus.
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