Unlike exocrine glands, endocrine glands

a.) release secretions outside the body.
b.) release digestive enzymes.
c.) release secretions directly into the blood.
d.) usually have ducts.

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.

The law of states that traits are passed from parents to offspring independently of one another.. true or false

The solution inside a plant cell is approximately a 1% saline solution and a 21% nacl solution the ,cytoplasm of a plant cell will