Respiratory structures in insects are
a) lamellae.
b) spiracles and tracheae.
c) commonly termed book lungs.
d) lungs.
e) hemolymphic.
Ans: b) spiracles and tracheae.
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Nitrogen fixation results in the
A) loss of biologically available N from an ecosystem. B) formation of nitrogen gas. C) direct formation of nitrate. D) addition of biologically available N to an ecosystem.
Although Dolly the cloned sheep and her nucleus donor are clones, they do not contain the same ________ DNA.
Fill in the blank(s) with the appropriate word(s).
________ mutations affect only a single base pair in a gene.
Fill in the blank(s) with the appropriate word(s).
Which of the following diseases is the result of a bacterial infection of peripheral nerves?
A) botulism B) acute bacterial meningitis C) Hansen's disease D) tetanus E) rabies