In parts of equatorial Africa, where the malaria parasite is most common, the sickle- cell allele constitutes 20% of the B-hemoglobin alleles in the human gene pool. The
sickle cell trait provides an advantage against malaria compared to people with
normal hemoglobin. In the United States, the parasite that causes malaria is not
present, but African Americans whose ancestors were from equatorial Africa have
the sickle-cell B-hemoglobin allele. These differences in traits illustrate

life would be meaningless without memes

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

hi i’m going crazy about going tomorrow and i’ll tell you what i’m doing and i wanna is a way ya

a. suckling by young

b. hypothalamus

c. dopamine

d. trh

e. anterior pituitary

f. mammary glands

g. milk production