The bonding of oxygen to red blood cells is important to the body because it enables the body to

A absorb nutrients from food.
B make energy from light.
C maintain a constant temperature.
D perform aerobic respiration in cells.


D perform aerobic respiration in cells.

Biology & Microbiology

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What part of the brain acts to control the pituitary, and many other organs separate from the brain?

a. thalamus b. thyroid c. pineal d. hypothalamus e. adrenal gland

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Topsoil is richest in

a. minerals b. sand. c. clay. d. organic matter e. none of these

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Renin stimulates the secretion of aldosterone

Indicate whether the statement is true or false

Biology & Microbiology

A virus was used to alter human cells. mRNA for a gene was inserted into the virus, and the virus infected the human cells and inserted the gene into the genome of the cell. What type of virus could do this?

a. the T4 bacteriophage b. a temperate phage c. a retrovirus d. all of the above

Biology & Microbiology