The absence of which of the following pigments

prevents a plant from responding to the duration of
light and darkness?
a. chlorophyll
b. xanthophyll
c. carotene
d. phytochrome
e. flavoproteins


Answer: d

Biology & Microbiology

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Which of the following statements is true of horsetails?

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Which group is characterized by radially symmetrical members?

a. arthropods b. cnidarians c. flatworms d. mollusks e. annelids

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In what stage of translation does the peptide bond join two amino acids?

a. initiation b. transcription c. elongation d. reparation e. termination

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Which term refers to a fruit that develops from a single ovary in a single flower?

a. simple fruit b. accessory fruit c. multiple fruit d. aggregate fruit

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