Newborn humans face thermoregulatory challenges as do small mammals. One mechanism they use to generate heat is
A. nonshivering thermogenesis in "brown fat."
B. evaporation in "brown fat."
C. radiation in "brown fat."
D. convection in "brown fat."
E. shivering thermogenesis in "brown fat."
Answer: A
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How does peer review influence the development of scientific theories?
A. Peer review allows other scientists to know what is current in their field. B. Careful evaluation of research results by other scientists ensures that only solid and legitimate research results are published, and helps prevent faulty research or false claims from being viewed as scientific fact. C. Peer review increases competition among scientists and thus increases the quality of the published work. D. Peer review makes it extremely difficult for work to be published other than earth-shattering scientific theories.
Matching. Choose the most appropriate response for
each statement. 1. ___ cladogenesis 2. ___ species 3. ___ isolating mechanism 4. ___ sympatric speciation 5. ___ polyploidy 6. ___ punctuation model 7. ___ mass extinction 8. ___ allopatric speciation 9. ___ adaptive radiation A. geographic separation of two populations accompanied by gradual speciation B. encompasses all of those actually or potentially interbreeding populations that are reproductively isolated from other such groups C. a population occupying the same home range undergoes reproductive isolation D. morphological changes compressed into brief periods followed by speciation E. branching pattern of speciation F. catastrophic, global loss of species G. a burst of microevolutionary activity within a lineage H. inheritance of three or more sets of chromosomes I. prevents gene flow between populations
When sodium chloride is dissolved in water, it dissociates to form ______ ______ and ______ ______.
Fill in the blank(s) with the appropriate word(s).
Experience with dog breeding has taught geneticists ________
A) that, given enough time, any desired trait can be bred into dogs B) that purebred dogs have offspring with qualities identical to the parents, because all purebred dogs are alike genetically C) that, while physical traits can be molded through artificial selection, behavioral traits cannot D) that geographically isolated groups of dogs may be selected for quite different traits, resulting in a different dog breed