What is an oocyte?
A. Haploid animal egg
B. Immature sperm
C. Polar body arising from mitosis of the egg
D. Immature, diploid animal egg
E. Haploid germ cell
Answer: D
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In the Calvin cycle, the enzyme that catalyzes the capture of carbon dioxide and the formation of 3-phosphoglycerate is
A) phosphoglycerokinase. B) ribulose bisphosphate carboxylase/oxygenase (rubisco). C) triose phosphate isomerase. D) phosphoribulokinase. E) glyceraldehyde-3-phosphate dehydrogenase.
Sexual reproduction occurs when _______.
a. an unfertilized egg develops normally b. two female gametes fuse and develop c. a sperm from a male fuses with an egg from a female d. two male gametes fuse and develop
What is the maximum length of a polypeptide encoded by an mRNA that is 45 nucleotides long?
What will be an ideal response?
Select the pair in which the nitrogenous waste is INCORRECTLY matched with the benefit of its excretion.
A. urea: very insoluble in water B. urea: low toxicity relative to ammonia C. uric acid: minimal loss of water when excreted D. ammonia: very soluble in water E. uric acid: can be stored and excreted as a precipitate