In this illustration, some of the organisms are vertebrates while others are both vertebrates and amniotes. Which of the following pairs are in both clades?
a. lancelets and lampreys
b. lampreys and humans
c. rabbits and lizards
d. lancelets and rabbits
c. rabbits and lizards
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The earliest land plants appeared in the fossil record:
A. about 500 million years ago B. about 300 million years ago C. about 100 million years ago D. a billion years ago E. about 10 million years ago
Identify the correct comparison between the human X and Y chromosomes.
A. Only the X chromosome is paired with a homologous match in human females. B. The X chromosome is larger than the Y chromosome. C. Only the Y chromosome is always found without a homologous match. D. Although both are sex chromosomes, they do not share the same genes. E. All of the answer choices are correct.
The type of diabetes that causes the body to destroy its own insulin-producing cells is:
A) Specific types B) Gestational C) Type 1 D) Type 2
Which statement best sums up our understanding of how animals navigate during migration?
A. We have a thorough understanding of orientation but not navigation. B. Animal navigation is a complete mystery. C. The mechanisms have been worked out in great detail, from the genes involved, to the brain structures, to the resulting behavior. D. We have some understanding of the information different animals rely on (sun, stars, or magnetic fields), and some sensory structures, but beyond that the mechanisms are still mysterious.