All living things have the following characteristics except
a. responsiveness to external and/or internal stimuli.
b. utilization of energy.
c. self-replication.
d. growth.
e. sexual reproduction.
E
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Refer to the accompanying figure. Which one of the following is NOT a plausible hypothesis to explain the differences in caterpillar appearance observed in this population?
A) The longer day lengths of summer trigger the development of twig-like caterpillars. B) The cooler temperatures of spring trigger the development of flowerlike caterpillars. C) Differences in air pressure, due to differences in elevation, trigger the development of different types of caterpillars. D) Differences in diet trigger the development of different types of caterpillars.
The placenta ____.
A. forms from endometrial and extraembryonic tissues B. will cover about one-half of the inner uterine surface at full term C. intermingles fetal blood with maternal blood D. secretes only estrogen to maintain the uterine lining during the second and third trimesters E. secretes only progesterone to maintain the uterine lining during the second and third trimesters
Complete the analogy: ________ are to vertebrate evolution as ________ are to plant evolution
A) Lungs; stomata B) Amniotic eggs; seeds C) Limbs; flowers D) Opposable thumbs; hyphae
A photograph of a Victorian trophy room shows the heads of 15 species of hoofed mammals, all shot within a day's walk of a single hunting camp in Africa. This camp was probably located in
A) tropical rain forest. B) chaparral. C) savanna. D) desert.