Scientists are constantly trying to find renewable sources of energy. Which of the following is a benefit of renewable resources?
A) Renewable resources are easily accessible and less expensive to harvest.
B) Renewable resources are sustainable and can be used for years to come.
C) Renewable resources are not sustainable and cannot be replaced once they have been used.
D) Renewable resources are usually more costly to harvest and more difficult to use.
Ans: B) Renewable resources are sustainable and can be used for years to come.
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Food chains in the ocean depths tend to be long
because these habitats have a. an abundance of producers. b. stable environmental conditions. c. a variety of energy sources. d. an abundance of decomposers. e. small numbers of predators.
What type of wetlands would be found adjacent to the Missouri River?
A) fringe wetlands B) mires C) bogs D) bottomlands
The marsupials in Australia closely resemble the placental animals of the rest of the world. This is an example of
A. the fossil record. B. homology. C. biogeography. D. convergent evolution. E. development.
Scanning electron microscopes bombard specimens with a stream of electrons; however, the specimen image is produce by electrons that are derived from atoms of the specimen itself rather than by the electrons used to bombard the specimen.
Answer the following statement true (T) or false (F)