Which group of plants emerged first?

A) angiosperms
B) gymnosperms
C) pteridophytes
D) conifers


C

Biology & Microbiology

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The site-specific recombinases are similar to topoisomerases in what way?

A. They introduce supercoils. B. They require ATP hydrolysis for their activity. C. They promote phosphoryl group transfers in which the net change in free energy is close to zero. D. They also assist in compaction of the DNA. E. They mediate strand invasion reactions.

Biology & Microbiology

A plant with a weak compartmentalization response is susceptible to ________

a. being outcompeted by invasive species b. invasion of wounds by decomposers c. drought d. all of the choices

Biology & Microbiology

Plants take in the sun's energy by absorbing.

a) high-energy sugars. b) chlorophyll a. c) chlorophyll b. d) sunlight.

Biology & Microbiology

Changes that occur at the genetic level in populations are classified as ________

A) gradualism B) microevolution C) macroevolution D) chemical evolution

Biology & Microbiology