Which taxa received chloroplasts from green and red algae during the secondary endosymbiosis event (proposed from composite phylogenetic analysis of Eukarya)?
a. brown and golden algae as well as terrestrial plants
b. brown and golden algae, diatoms, and euglenids
c. euglenids and microsporidia
d. terrestrial plants
Answer: B
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A complete virus particle is called a
A. virion. B. nucleocapsid. C. capsid. D. cell.
Which type of plant hormone appears to play a major role in gravitropism in roots and shoots?
a. salicylic acid b. gibberellins c. abscisic acid d. auxins e. oligosaccharins
Sometimes, one gene pair will interfere with the expression of a second gene pair in an interaction called ________.
A. epistasis B. pleiotropy C. blending inheritance D. codominance E. incomplete dominance
The molecule that an enzyme acts upon is known as its
A) substrate. B) coenzyme. C) apoenzyme. D) product. E) catalyst.