Which of the following is the primary function of the nucleus? Choose 1

(Choice A)
A
Breaking down unnecessary materials

(Choice B)
B
Producing ATP for the cell

(Choice C)
C
Absorbing sunlight

(Choice D)
D
Storing genetic material

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air