A scientific theory can be based upon an untested hypothesis.

a. true
b. false


a. true

Biology & Microbiology

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Microspores are indicated by

a. A. b. B. c. C. d. D. e. E.

Biology & Microbiology

In a grasshopper, all the body tissues are bathed in blood that is in the

A) tracheae. B) heart. C) spiracles. D) hemocoel. E) capillaries.

Biology & Microbiology

Which of the following is not affected by the presence of epigenetic marks?

A. development B. imprinting C. X chromosome inactivation D. maturation of RNA E. unique expression patterns in different cells

Biology & Microbiology

Which zone of the ocean is found above the

continental shelf? a. abyssal b. benthic c. pelagic d. neritic e. oceanic

Biology & Microbiology