How are the eyes of sharks well adapted to the environment in which they live?
What will be an ideal response?
In the marine environment colors, especially red and orange, tend to get absorbed within the first few meters of water. As a result, color in the shallow marine environment is composed mostly of grays and shades of blue. The eyes of sharks, with their high rod content, are well adapted for viewing objects in dim environments where gray and black colors prevail.
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Match each mollusk with the correct taxonomic class.
1. nautili 2. snails 3. chitons 4. clams a. Polyplacophora b. Gastropoda c. Bivalvia d. Cephalopoda
Which of the following features is common among the roundworms as well as the arthropods?
A. Segmentation is readily apparent. B. Periodically shed their outer covering. C. Radial symmetry. D. Undergo metamorphosis. E. Endoskeleton.
The study of biological diversity and evolutionary relationships among organisms is
A. nomenclature. B. taxonomy. C. ecology. D. systematics. E. biology.
Today, the major danger to species is:
a. hunting by humans. b. introduction of exotic species. c. destruction of habitats. d. predator control. e. commercial harvesting