Which of the following things result from symbiotic relationships between bacteria and eukaryotes? (Select all correct choices.)
A. bioluminescence in the bobtail squid
B. amino acid synthesis in aphids
C. cellulose breakdown in the human gut
D. vitamin production in the human gut
A,B,C,D
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Animals that use an exoskeleton for movement include
_____ crustaceans. _____ cnidarians. _____ reptiles. _____ insects. _____ protists.
The biological species concept relies primarily on the ability of individuals within the species to
a. adapt to the environment. b. have greater longevity. c. intermingle with other species. d. live in a variety of habitats. e. produce fertile offspring when mating with one another.
The leaves of plants can be thought of as "eating" sunlight. From an energetic perspective this makes sense because:
a. light energy, like chemical energy released when the bonds of food molecules are broken, is a type of kinetic energy. b. the carbon-oxygen bonds within a photon of light release energy when broken by the enzymes in the chloroplasts. c. both light energy and food energy can be converted to kinetic energy without the loss of heat. d. photons are linked together by hydrogen bonds, which release energy when striking the surface of a leaf. e. the carbon-hydrogen bonds within a photon of light release energy when broken by the enzymes in the chloroplasts.
Involves study designs used to answer why? and how?
a. analytic epidemiology b. descriptive epidemiology c. differential epidemiology d. none of the above