What happens to the energy in an ear of corn once a cow eats it?
a. most of the energy from the corn is available to a human who eats meat from the cow.
b. the cow gives all of the corn’s energy off as heat energy.
c. it uses some of the energy for life processes, some of the energy is stored in the cow's tissues, and some of its energy is given off as heat energy.
d. the cow uses all of the corn’s energy for life processes.

Which of the following substances is not involved in the chemical reaction that pro- duces smog? a. sunlight b. particulate matter c. automotive exhaust d. ozone

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed