Which statement is correct, according to the figure above?
a. Descendant populations of the mustard plant growing after the severe 2000–2004 drought flowered much earlier in the season than those from predrought populations.
b. Descendant populations of the mustard plant growing after the severe 2000–2004 drought flowered much later in the season than those from predrought populations.
c. Hybrids flowered much later in the season than those from predrought populations.
d. None of the above.
e. B and C.
A
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The current extinction rate of vertebrates is 100–1,000 times the historical background. This is primarily due to
A. overharvesting. B. competition with exotic species. C. habitat destruction. D. competition with native species. E. random chance.
With __________, a chemical substance is passed
from organisms at each trophic level to those above and becomes increasingly concentrated in body tissues. Fill in the blank(s) with the appropriate word(s).
All chordates have pharyngeal gill slits at some point during their development
Indicate whether the statement is true or false
Which of the following types of muscles are striated?
A. skeletal and cardiac B. triceps and biceps only C. skeletal and smooth D. skeletal, smooth, and cardiac E. cardiac only