Oogenesis begins
A) at puberty.
B) after copulation.
C) after the sperm and egg merge.
D) during embryonic development.
E) at around day 14 of each menstrual cycle.
D
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Trichromatic color vision is best described as:
A. ability to see colors at night B. ability to see ultraviolet light C. ability to distinguish blue, green, and red colors D. ability to see reflected light E. all of the other choices provided
One adaptation to flight in birds is lighter bones, which lack
A. collagen. B. medullary cavities. C. calcium. D. the periosteum. E. bone marrow.
Scientists preparing preserved animals often inject colored latex into the circulatory system to identify different kinds of vessels. What color of latex is likely to be seen in blood vessels carrying oxygen-poor blood?
A. blue latex B. pink latex C. both colors mixed together D. spots of different colors in different parts of the pig E. None of the answer choices is correct.
Sound is amplified by components of the middle ear when they vibrate. When one of these components, the stapes, vibrates, the ________ will vibrate
A) tympanic membrane B) pinna C) oval window D) eustachian tube E) cochlea