Both active solar heating systems and passive solar heating systems a. must face south
b. use pumps and fans
c. reduce the need to use fossil fuels
d. only work during the day

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

Kudzu vines grow by climbing and wrapping around trees. trees covered by kudzu can die because they are starved of sunlight. what type of relationship exists between the trees and the kudzu growing on them?