Which physiological process allows many organisms to maintain relatively constant conditions within their cells and
tissues?
a. torpor
b. homeostatic responses
c. facultative responses
d. behavioral adaptations
e. photosynthesis
ANSWER: b
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In all vertebrates with four-chambered hearts, the ________ receives oxygenated blood directly from the ________.
A. left ventricle, left atrium B. left ventricle, lungs C. right ventricle, right atrium D. right ventricle, lungs E. left atrium, left ventricle
Which of the following statements is true about chemical elements in an ecosystem?
Which of the following equations represents the total water potential of a plant?
A. s2 + p2 = w2 B. ?s = ?p + ?w C. ?p = ?w + ?s D. ?w = ?p + ?s E. ?w = ?p - ?s
Hominins are ancestral to
A) humans and animals ancestral only to humans. B) humans and apes. C) humans, apes, and gibbons. D) apes and gibbons.