Which one of the following features of Archaeopteryx clearly demonstrates that it was on the evolutionary line leading from dinosaurs to birds?
A. bony tail
B. teeth
C. egg-laying ability
D. feathers
E. claws on forelimbs
Answer: D
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A ________ infection is a disease caused by a parasitic organism that is normally found in animals other than humans.
Fill in the blank(s) with the appropriate word(s).
Changing day length, as well as variations in precipitation and temperature, are environmental cues
that exert an important influence on: a. the kinds of genes a plant has. b. the number of mutations that genes undergo. c. whether a plant is an annual, biennial, or perennial. d. which genes will be expressed in a plant. e. whether a plant reproduces sexually or asexually.
When the concentration of glucose in the blood rises following digestion of a meal, what is the hormonal response?
A) Levels of both glucagon and insulin increase. B) More glucagon is released. C) More insulin is released. D) Neither glucagon nor insulin is released.
A mountain range along the coast of a continent is located perpendicular to the prevailing sea breeze. Which one of the following describes an area where the rain shadow is located?
A. on the leeward side, far inland from the mountain B. on the leeward side of the mountain where cool, dry air is descending C. on the leeward side of the mountain where warm, moist air is descending D. on the windward side of the mountain where warm, moist air is rising E. on the windward side of the mountain where cool, dry air is rising