Viral size is generally measured in
A) micrometers.
B) picometers.
C) nanometers.
D) centimeters.
Answer: C
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Some energy gets stored in molecules that most consumers cannot break down. For example, most carnivores cannot access energy tied up in bones, scales, hair, feathers, or fur. What effect does this have?
a. More energy is lost through heat by the energy needed for digestion. b. Energy transfer between trophic levels is efficient. c. It increases the need for many trophic levels. d. Only a small percent of the energy in an organism ends up in tissues of an organism at the next trophic level. e. Second-level consumers do not require as much energy.
Which of the following characteristics are shared by all living organisms?
I. hereditary information is passed to offspring II. adaptation to environmental change III. requirement for nutrients IV. DNA housed in a nucleus
a. I and II b. I and III c. II and III d. I, II, and III e. I, II, III, and IV
When the free energy of the reactants is greater than the free energy of the products, such a reaction is
referred to as: a. an entropic reaction. b. an endergonic reaction. c. an exergonic reaction. d. an enthalpic reaction. e. an activation reaction.
The first animals to invade land were
A. birds. B. amphibians. C. reptiles. D. arthropods.