Down syndrome can be caused by either trisomy 21 or a Robertsonian translocation
a. True
b. False
True
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An anatomical feature that distinguishes us from our closest relative, the apes, is a large, highly developed brain. Why would natural selection have favored an individual with a highly developed brain?
a. It provided traits required for an advanced culture. b. These individuals would have been much more successful at completing the tasks required to stay alive, such as hunting for food. c. It led to an extended life span. d. It provided eyesight with color vision and depth perception. e. It provided characteristics not seen before, such as standing upright.
Which region of the Earth would have the greatest solar exposure during the vernal equinox?
A. between 60° north and the north pole B. between 60° south and the south pole C. between 30° and 60° North D. between 30° and 60° South E. equatorial regions
Four of the following are true of euglenoids. Which statement is false?
a. Many move by pseudopods. b. Many contain chloroplasts. c. Many absorb nutrients from their environment in a heterotrophic manner. d. Their cell body is surrounded by a pellicle. e. They use a contractile vacuole to maintain water balance.
Hormones that are released by the posterior pituitary were made in the:
A) adrenal glands. B) thalamus. C) brain stem. D) anterior pituitary. E) hypothalamus.