Because most natural populations are actually metapopulations, we can only understand their dynamics if, in addition to the births and deaths of individuals, we also understand:
A. the extinction of local populations.
B. the colonization of local populations.
C. r and K selection.
D. the extinction and colonization of local
populations.
E. the extinction and colonization of local
populations as well as r and K selection.
D
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[Knowledge; Easy] The covalent modification most critical to the insulin signaling pathway is:
A. phosphorylation. B. methylation. C. acetylation. D. ubiquitination.
Cell extension involves
A. loss of water. B. low acidic condition. C. enzymes that produce polysaccharides. D. expansion of cellulose microfibrils. E. water leaving the central vacuole.
Most plant cells are pluripotent, meaning that they
a. constantly switch tissue types throughout their lives. b. cannot change after differentiating into a specific cell type. c. end up as a hybrid of tissue types. d. can function in any environmental condition. e. retain the ability to change cell types when necessary.
. Four of the five answers listed below are major
trends in terrestrial plant evolution. Select the EXCEPTION.
a. development of vascular tissue b. adaptation to drier environmental conditions c. microspores and megaspores d. animal assisted reproduction e. increasing dominance of the gametophyte phase