As the human population grows, what happens to our natural-resource requirements?
a. they increase.
b. they decrease.
c. they do not change.
d. they go in cycles.

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

During binary fission, what events must occur before the cell splits into two new cells?

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.