The immune system normally discriminates between ________ antigens.
A. primary and secondary response
B. B and T cells
C. self and nonself
D. humoral and cell-mediated
Answer: C
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Which of the following processes involves meiosis?
a. healing wounds b. increase in size during growth c. production of sperm cells d. uncontrolled division of cancer cells
Single-celled eukaryotes can survive and reproduce in both haploid and diploid forms. Yeast spend most of their life cycle and actively reproduce in which form?
What will be an ideal response?
Formation of NADP When NADPH _____ electrons and hydrogen ions in the carbon reactions, NADP+ is formed through _____.
a) accepts, reduction b) donates, oxidation c) accepts, oxidation d) donates, reduction
Gause's principle of competitive exclusion is based on the idea that ____.
A. larger organisms exclude smaller ones through competition as in the case of large trees controlling underbrush B. competition for the same resources excludes species having different life styles C. no two species can occupy the same niche indefinitely when resources are limited D. two species can coexist if their niches do not overlap E. species survival depends upon coevolution