A relationship that has been established based on a large amount of observational and experimental data is a(n)

A) fact.
B) assumption.
C) conjecture.
D) theory.


Ans: D) theory.

Biology & Microbiology

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The interaction between two species in which

both species may be harmed is known as

a. parasitism. b. mutualism. c. competition. d. predation. e. commensalism

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Four of the five actions listed below are true of

testosterone. Select the exception. a. promotes secondary sex characteristics b. influences sexual behavior c. necessary for growth and function of male reproductive tract d. stimulates spermatogenesis e. produced by spermatogonia cells

Biology & Microbiology

Which statement concerning a scientific theory is FALSE?

a. It is unchangeable. b. It predicts new facts. c. It is based on a number of hypotheses. d. It may suggest practical applications. e. It is supported by many observations.

Biology & Microbiology

Eukaryotic chromosomes are composed of a complex of 60% protein and 40% DNA. This complex is referred to as

A. the histone complex B. the kinetochore C. chromatin D. cohesin

Biology & Microbiology