In response to global climate change, it is likely that some plant species will survive while others will go extinct. All of the following are explanations of this pattern except:
A. greenhouse gases are toxic, so increasing
levels of these gases will cause some plants
to go extinct.
B. plants differ in their abilities to respond
physiologically to persistent environmental
change, and some will survive increased
temperatures.
C. temperatures may increase more rapidly
than some species can adapt, which will lead
to their extinction.
D. some plants are able to migrate more
effectively than others and can move into
areas with more favorable conditions for
survival.
E. All of the answer options are correct
explanations for the predicted pattern.
A
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The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called:
A. The kinetochore B. The centromere C. The cohesin complex D. The centriole E. The centrosome
Distinguish among interphase, mitosis, and cytokinesis.
(a) Interphase: (b) Mitosis: (c) Cytokinesis:
Small, photosynthetic protists found in aquatic habitats are collectively called
a. zooplankton. b. phytoplankton. c. phagoplankton. d. bryophytes. e. chrysophytes.
Which of the following characteristics is not associated with metastasis?
A. The internal cytoskeleton is disorganized. B. The cancer cells lack intact actin filament bundles. C. Cancer cells produce proteinase enzymes. D. Invasive cancer cells are abnormally shaped. E. The low oxygen content in the middle of a tumor may turn on genes for angiogenesis.