Describe the modifications seen in birds for flight. Include modifications in as many body systems as
possible. What will be an ideal response?
Concepts to Consider: Birds are light, and many body systems show reductions to reduce weight;
their bones may be hollow; their respiratory system is particularly efficient to meet the energetic
demands of flight; uric acid is excreted often; their senses are well developed, which allows precise
flight; many migrate great distances to facilitate reproduction in optimal habitats.
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The similarity in appearance between bees and wasps is an example of ________
a. competitive exclusion b. interspecific competition c. mutualism d. mimicry e. resource partitioning
What percentage of the nervous system is made up of neurons?
a. five b. ten c. fifteen d. twenty e. fifty
Each year, the direct and indirect costs of psychiatric and neurological disorders in the United States amount to about:
A) $40 billion B) $400 million C) $400 billion D) $40 million
Most of the lymph fluid is returned to the bloodstream through the thoracic duct to the
A. left atrium of the heart. B. right atrium of the heart. C. right ventricle of the heart. D. left subclavian vein. E. right subclavian vein.