One solution to the problem of species extinction is captive breeding in zoos and gardens. What are some of the problems associated with this solution?
What will be an ideal response?
The resulting population, because it is small, will have a low genetic diversity. Such programs mimic the bottleneck effect unless efforts are made to increase diversity.
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As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER—RADIOACTIVE ISOTOPES IN USE. Your friend is an accounting major and has not had any science courses yet. She asks you what a radioactive isotope is and you respond correctly with:
A. Radioactive isotopes are atoms that are unstable and as a result emit energy in a process called radioactive decay. B. Radioactive isotopes are atoms that are stable and as a result emit energy in a process called radioactive decay. C. Radioactive isotopes are atoms that are stable and as a result only emit energy if they are exposed to higher temperatures. D. Radioactive isotopes are atoms that are unstable but unless actively disturbed by some chemical process will remain intact and pose no problems.
If caloric intake is balanced with energy output, body
a. weight gain will occur. b. weight loss will occur. c. weight will remain stable. d. fat content will increase. e. protein will decrease.
Dental plaque is an example of
A) an endospore. B) a cell membrane. C) a biofilm. D) beneficial bacteria. E) bacterial flagella.
Interphase chromosomes are about______ times less compact than mitotic chromosomes, but still are about______ times more compact than a DNA molecule in its extended form
(a) 10, 1000 (b) 20, 500 (c) 5, 2000 (d) 50, 200