Species richness refers specifically to
a. the numbers of individuals of each species
present.
b. the ability of larger animals to enrich themselves
by successfully preying on smaller ones.
c. the number of different species in the habitat.
d. the feeding levels at which the animals are
located.
e. none of these.
Answer: c
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The earliest species known to reproduce sexually was a
a. cyanobacterium. b. green alga. c. fungus. d. red alga. e. archaebacterium.
An aerobic process requires ______.
A. oxygen B. carbon dioxide C. ATP D. carbohydrates
Which of the following statements is false?
a. Sharkâs teeth are modified scales that are continuously shed and replaced. b. Many fish use a swim bladder to provide buoyancy control. c. The bony fishes were the ancestors of the cartilaginous fishes. d. The ray-finned fishes are the most numerous and diverse of the fish groups. e. The lobe-finned fishes are represented today only by the coelacanths.
Which of the following statements accurately describes a role of prokaryotes in chemical recycling?
a. Photoheterotrophs convert atmospheric CO2 into organic compounds. b. Chemoautotrophs such as the soil bacterium Burkholderia glathei increase the availability of nitrogen for growing seedlings. c. Chemoheterotrophic prokaryotes may function as decomposers to return chemical elements to an ecosystem. d. Photoautotrophic bacteria living on hydrothermal vents support communities of eukaryotic species. e. All of the listed responses are correct.