During fertilization, a sperm combines with a nucleus in the ovule to form

a. an egg. b. stored food. c. an ovary. d. a pollen grain.

An epidemic (or epiphytotic) is the development of disease:a. On a susceptible plant b. On a plant c. Within a population of plants d. On a plant leafe. None of the others

Where is oxygen first used in the transition from anaerobic to aerobic metabolism?

What structure is required for an eukaryotic organism to be classified as an autotroph?

A shift of the resting transmembrane potential toward 0 mv is called

What are renewable sources of energy better than nonrenewable sources? A. because we will not run out of them B. Because they are fossil fuels C. Because they are more expensive D. Because they release greenhouse gas

Select all that apply. Which of the following are characteristics of Cnidaria? radial symmetry acoelomates bilateral symmetry coelomates asexual reproduction sexual reproduction

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