Which of the following does NOT occur during prophase of mitosis?
a. the nuclear envelope disappears.
b. the mitotic spindle forms.
c. chromatin condenses into chromosomes.
d. centrioles migrate to opposite poles of the cell.
e. chromosomes decondense into chromatin.
E
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Which of the following adaptations are LEAST likely to be found in plants which regularly experience dry, hot conditions?
A) CAM plants that grow rapidly B) small, thick leaves with stomata on the lower surface C) a thick cuticle on fleshy leaves D) large, fleshy stems with the ability to carry out photosynthesis E) plants that do not produce abscisic acid and have a short, thick taproot
The function of DNA ligase is to:
A. catalyze the formation of covalent bonds between adjacent nucleotides. B. unwind the double-stranded DNA prior to replication. C. keep the single strands of DNA apart during replication. D. facilitate base pairing between single stranded molecules of DNA. E. catalyze the formation of hydrogen bonds between adjacent nucleotides.
Which of the following represents a reactant or input for the light reaction of photosynthesis?
A. oxygen B. carbon dioxide C. ATP D. NADPH E. H2O
Ancestral lobe-finned fishes gave rise to modern-day lobe-finned fishes, the lungfishes, and to the amphibians.
Answer the following statement true (T) or false (F)