Modified leaves that protect meristematic tissue at the tips of woody plants are known as:
a. bulbs.
b. bud scales.
c. spines.
d. tendrils.
e. scale scars.
B
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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.
One theory of human evolution suggests that Homo erectus evolved directly into Homo sapiens (humans), after which point Homo erectus became extinct. If this is true, humans arose by ______
A. cladogenesis B. anagenesis C. allopatric speciation D. parapatric speciation
The 14 species of Darwin's finches on the Galapagos Islands mainly differ in:
a) body size. b) tail length. c) song type. d) coloration. e) bill size.
Select the option that is a product of cellular respiration.
A. oxygen B. ATP C. ADP D. glucose