The term "ecological succession" refers to
A. the flow of energy from producers to consumers.
B. replacement of one plant community by another.
C. successive seasons of the year that guide the growth of ecosystems.
D. an unending series of geological events that occur in all areas.
B. replacement of one plant community by another.
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According to research done by Baron and Prado, how do prions move within the CNS?
a. They use receptors on the surfaces of nerve cells. b. They use vesicles found inside the nerve cells. c. They use tunneling nanotubes. d. They pinch off the nerve cell membrane. e. They stick to the outer surfaces of nerve cells.
Which of the following is a trait that evolved in ALL land plants?
A. protection of the embryo B. seeds C. apical growth D. vascular tissue
What leads paleontologists to hypothesize that whales evolved from wolf-like carnivores?
A) molecular analysis of whale DNA B) observations of fossil teeth C) the presence of vestigial structures in both species D) mathematical analysis using the Hardy-Weinberg formula
Two species of birds that are kept from interbreeding by the differences in their mating songs are experiencing ________ isolation
Fill in the blank(s) with correct word