Which class of hormones produced in the roots of plants promotes cell division and growth and retards the aging of flowers and leaves?

A) gibberellins
B) phytochromes
C) cytokinins
D) ethylene


Answer: C

Biology & Microbiology

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Top-down factors that can control the population sizes of plants or animals include

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Species identification is based on all of the following except:

a. DNA-DNA Hybridization. b. 16sRNA sequencing. c. Cell wall composition. d. Colonial pigmentation.

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The different beaks of the many Galapagos finch species are homologous because they are variations of a common ancestral body plan.

a. true b. false

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