The theory illustrated in Figure 21-1 is supported by which piece of additional evidence?
a. The results of the Miller-Urey experiment.
b. Burgess shale fossils.
c. Ediacarian fossils.
d. The presence of DNA in some organelles.
e. All answers support the illustrated theory
D
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Too little cortisol may lead to
a. hypoglycemia. b. diabetes. c. acromegaly. d. hyperglycemia. e. increased breakdown of fats.
Most segmentation genes code for:a
transcription factors. b. genetic switches such as operators. c. repressors. d. insulin-like growth factors. e. morphogens.
How is the structure of a mitochondrion related to its function of generating energy?
A) The mitochondrion has an oval shape. B) The mitochondrion is surrounded by a membrane. C) The mitochondrion has a highly folded internal membrane. D) The mitochondrion contains genetic information inherited from the mother.
Which of the following is an example for Batesian mimicry?
a. paper wasps and yellow jackets that both have black and yellow stripes b. defenseless spiders that look like ants c. crab spiders that mimic the color of flowers on which they live d. Heliconius butterfly species that share warning patterns and that are both unpalatable