The X chromosome is
A. larger than the Y chromosome.
B. smaller than the Y chromosome.
C. the same size as the Y chromosome.
D. genetically identical to the Y chromosome.
E. larger and genetically identical to the Y chromosome.
A. larger than the Y chromosome.
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Which of the following could be classified as a "transitional form" fossil?
A. Hyracotherium, the first fossil of a horse that was found 55 mya. B. An early amphibian tetrapod from 360 mya. C. A clam shell laying at the bottom of the ocean. D. A fossil that has all of the ancestors traits and none of the present day animals traits. E. A fossil that has some ancestoral traits and some traits that are found in present day animals.
During the course of Darwin's journey aboard the HMS Beagle he was collecting and recording _____ and ________.
A. religious; political evidence B. fossils; geological evidence C. historical; biological evidence D. geological; biological diversity evidence E. biological; genetic evidence
What would you find in the heart of an amphibian?
A. two atria and one ventricle B. two atria and two ventricles C. two atria and a partially divided ventricle D. one atrium and one ventricle E. one atrium and two ventricles
The greenhouse effect is due to high levels of which gas in the environment?
A. carbon dioxide B. carbon monoxide C. nitrogen D. ammonia E. oxygen