Which type of regulator(s) specifically bind to operator regions of DNA?

A) activators
B) activators and inducers
C) repressors
D) repressors and corepressors


Answer: C

Biology & Microbiology

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________ radiation excites atoms to a higher energy state within molecules such as DNA, which leads to the formation of pyrimidine dimers.

A. Gamma B. Particle C. Ultraviolet D. Infrared E. Ionizing

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Guppies were moved from stream A, with a fish that preyed upon adult guppies, to stream B, with a fish that preyed upon juvenile guppies

After 30 to 60 generations, the guppies responded to the increased predation on juveniles relative to adults by A) feeding less frequently. B) increasing age at maturity. C) increasing the number of individuals in a school. D) becoming smaller in body size.

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What adaptations did ancient algae have to make as they washed ashore and evolved into land plants?

What will be an ideal response?

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What explains the coloration of giant kelp?

A. It is the result of waste products stored in the tissues. B. It warns grazers of their toxic properties. C. It facilitates absorption of the blue-green light prevalent in their environment. D. It facilitates absorption of the brown light prevalent in their environment. E. It camouflages them from grazers.

Biology & Microbiology