What is often true of the fruits eaten by birds and mammals?
A. They mimic the shape of insects.
B. They contain a large number of parasites.
C. They are brightly colored.
D. They are pale colored with strong odors.
Answer: C
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Which type of regulatory protein(s) is/are present in Archaea?
A) Activators that stimulate RNA polymerase activity are present in Archaea. B) Repressors that block RNA polymerase activity are present in Archaea. C) Both activators and repressors are present in Archaea. D) Similar to regulation in Eukarya, Archaea lack bacterial-like regulators such as activators and repressors and use transcription factors instead.
What is a riffle?
A) the deepest part of the streambed bottom B) a pool of water in a stream C) an herbivorous aquatic insect D) a fast-moving shallow body of water
Which of the following organisms is a keystone species in a tropical rain forest?
a. gray wolf b. fruit-eating bats c. poison arrow frogs d. fig trees e. fruit-eating monkeys
To absorb large particles, cells engulf them within their plasma membrane in a process called:
a. endocytosis. b. exocytosis. c. translation. d. transcription. e. replication.