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Some marine biologists fear the destructive capabilities of the parrotfish, which
can scar and destroy large areas of reef. However, recent studies show that when
large herbivores like the parrotfish are prevented from feeding along an area of ...
Although many do roam the open ocean, there are sharks associated with nearly
every marine habitat. Some biologists theorize that the sharks' ability to survive in
different habitats and thus avoid competing with one another for food is the key ...
They are not presently endangered although biologists are fearful they will be by
pollution (see Chapter 11, The Pelagic Zone). ♢ How do these air-breathing
animals survive in the early-spring, ice-filled waters of the poles? The poles,
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I purchased all three books in this set and taught a short course to a small group of high school kids. We had a great time with this course! We did 10 experiments and held very intense all-day ... Read full review