The sexual phase of Plasmodium is called a:
A. sporozoite
B. gametocyte
C. merozoite
D. plasmacyte
E. anthracite
B. gametocyte
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Although insects and birds both have wings, the structures do not come from the same lineage and these species do not share a common ancestor. This would be an example of ______.
a. a homologous structure b. a vestigial structure c. an analogous structure d. none of the above
A mutation creates a dominant negative allele of a particular gene. The gene encodes a protein that forms a trimer within the cell. If one or more of the subunits has the mutant structure, the entire trimeric protein is inactive. In a heterozygous cell, if the proteins of both alleles are present at the same levels, what percent of the trimers present in the cell will be active?
A) 100% B) 87.5% C) 50% D) 33% E) 12.5%
Which hormone increases muscle mass?
a. progesterone b. estrogen c. luteinizing hormone d. testosterone e. myostatin
The antidiuretic hormone (ADH) ____
a. controls levels of GH b. influences levels of LH c. influences levels of FSH d. reduces urine output e. causes contractions of the uterus