A group of interbreeding individuals occupying the same habitat at the same time is a(n)
A. species.
B. guild.
C. population.
D. equilibrium.
E. quadrat.
C. population.
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True or false: Supercoils in DNA are induced or relaxed by enzymes called topoisomerases
A. true B. false
Which protein influences the ability of RNA polymerase to transcribe genes?
A. DNA polymerases B. DNA helicases C. transcription factors D. snRNPs E. tRNA
All of the following are model organisms, except
A) Saccharomyces cerevisiae. B) Drosophila melanogaster. C) Caenorhabditis elegans. D) Arabidopsis thialana. E) Homo sapiens.
High energy sources on early Earth, which were most likely involved in the origin of life, included:a
volcanic activity, lightning, and ultraviolet radiation. b. bombardment from meteorites, gamma radiation, and cosmic radiation. c. intense radiation, volcanic activity, and redox energy. d. oxidizing environment, electrical discharge, and geothermal energy. e. infrared radiation, ultraviolet radiation, and oxidizing radiation.