Which hormone, synthesized by the anterior pituitary gland, causes the body to manufacture an abundance of muscle tissue?
a. Growth hormone
b. Prolactin
c. Thyroxin
d. Follicle-stimulating hormone
e. Adrenocorticotropic hormone

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

If the dimensions of a cube-shaped cell with a length,height, and width of 1 micrometer were to double, what would be the cell's new ratio of surface area to volume? a.3 to 1 b.4 to 3 c.1 to 2 d1 to 6

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is