What is the difference between invertebrate and vertebrate chordates? What organism has
characteristics of both? What will be an ideal response?
ANS:Answer
should include:
? Chordates, in general, are characterized as having a notochord, a tubular dorsal nervous
system, and gill slits at some point in their development.
? Invertebrate chordates are organisms that have lost their notochord as they developed.
? Vertebrate chordates have the unique characteristic of the stiffening backbone. They also
have internal skeletons made of calcified bone or cartilage. Skeletons gave protection to
organs, a foundation for muscles, and uninterrupted support during growth.
? Amphioxus is the transitional species from invertebrate to vertebrate. It swims by
undulating its body much like a fish while combing the water for food. Its well
developed dorsal nerve chord is similar to a vertebrate's spinal cord.
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In the surface energy budget, - SW represents
A) NET R. B) incoming energy. C) shortwave reflectance. D) heat.
A good example of relative space and its contingent character is:
A) the space of forests. B) the space of governments. C) the space of a nation-state. D) the space of technology. E) the space of trade.
How can viable genetic diversity be restored when a population becomes very small?
A) through asexual reproduction B) through inbreeding C) through hybridization with another species D) through captive breeding programs E) through sterile breeding techniques