Which of the following describes primary succession?
a. succession on land that previously had no life
b. succession that moves a community away from equilibrium
c. succession in response to a natural disturbance
d. succession characterized by equilibrium
Answer: a. succession on land that previously had no life
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Trypanosomiasis is spread by
A. mosquitoes. B. airborne droplets. C. tsetse flies. D. fleas on rats. E. contaminated water.
Which of the following statements concerning receptors is FALSE?
a. They are found inside the cell and on the cell surface. b. They are proteins or glycoproteins. c. They are also called ligands. d. They are highly selective. e. They are activated by binding to a signaling molecul
Why is prokaryotic cell division fundamentally different from eukaryotic cell division?
A) Prokaryotic cells have a single chromosome and no nuclear membrane. B) Prokaryotic cells do not have a plasma membrane. C) Prokaryotes have many more chromosomes to divide. D) Prokaryotic cells divide for several months and then live for decades without dividing.
If an individual is exposed to external stress, the nervous system is capable of responding faster than the endocrine system.
Answer the following statement true (T) or false (F)