The simplest animals to display cephalization and centralization of the nervous system are
A) sponges.
B) flatworms.
C) cnidarians.
D) echinoderms.
Answer: B
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People with type A blood have red blood cells that express one type of recognition protein, while those with type B
blood express a different recognition protein. People with AB blood express both recognition proteins. Why can a person with AB blood receive blood from a person with type A, but a person with type A blood cannot received blood from a person with type AB?
What will be an ideal response?Where does the most energetically costly mode of locomotion occur?
A. On land B. Locomotion in the water and on land are nearly equivalent in terms of energy expenditure. C. In the water D. In the air
If dense bone lacked canaliculi:a
there would be no blood supply to the cells. b. diffusion between cells would not be possible. c. there would be no nerve supply to the tissue. d. the extracellular matrix would not be formed by osteoblasts. e. the osteoclasts would not be able to remodel the bone.
Which of these best describes Type II survivorship?
A) There is high survivorship for the very young. B) Most individuals survive to older age intervals. C) Survivorship is constant over the lifespan. D) Survivorship is high for the few individuals that survive to a certain age.