In plants that undergo double fertilization, the structure that forms to nourish the seed is called the

a. endosperm.

b. egg cell.

c. gamete.

d. cone.

How many possible combinations of one chromosome pair vould a person inherit

The occurrence of withdrawal symptoms signals that the body has adjusted to the presence of the drug. indicates that substance abuse has developed. is seen when use of any psychoactive substance is terminated.

List 4 techniques, other than thorough cooking, that are important in preventing foodborne illness.

Estuary ecosystems are important to humans as a source of

Which of the following is a consequence of clear-cutting? A. Increased biodiversity B. Reduced wildlife habitat C. Reduced soil erosion D. Improved air quality

Which of the following correctly arranges the planets by the size of their diameter? A) Uranus < Neptune < Mercury < Earth B) Earth < Mercury < Neptune < Uranus C) Mercury < Earth < Saturn < Jupiter D) Jupiter < Saturn < Earth < Mercury

How does ultra radiation cause skin cancer

How many ribose molecules are found in ATP?

Would a person be squashed by extreme gravity, float with ease, freeze, burn up, or something else

According to "Life Without Gravity," why can astronauts' muscles become weak? A. Without gravity, the blood is rerouted from the legs to the head. B. Without gravity, the body "grows" by as much as several inches. C.