1.
A) heterotrophic and digestive system B) segments and radial symmetry C) hair and mammary glands D) digestive system and sexual reproduction 2.
A) excretion B) waterproofing C) insulation D) camouflage 3.
A) ruminant B) trophism C) signaling D) endothermy 4.
<![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078757134/383923/gz.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (9.0K)</a>]]> A) body temperature and metabolic rate B) the mass, height, and length of various mammals C) relationship of a mammal's mass to body temperature D) relationship of a mammal's metabolic rate to its mass 5.
<![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078757134/383923/gv.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (20.0K)</a>]]> A) exhalation caused by the diaphragm B) inhalation caused by the diaphragm C) intake of carbon dioxide D) heart contraction 6.
A) sweat glands are stimulated--skin cools--sweat evaporates B) sweat glands are stimulated--sweat evaporates--skin cools C) sweat evaporates--sweat glands are stimulated--skin cools D) skin cools--sweat evaporates--sweat glands are stimulated 7.
<![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078757134/383923/gy.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (9.0K)</a>]]> A) both have mammary glands B) both have hair C) both have chordate ancestry D) both have wings 8.
<![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078757134/383923/gw.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (18.0K)</a>]]> A) keeps oxygenated blood from entering lungs B) mixes oxygenated and deoxygenated blood C) keeps blood from entering liver D) keeps oxygenated and deoxygenated blood separated 9.
A) chiroptera B) monotremes C) marsupials D) placental mammals 10.
A) placental mammals B) monotremes C) marsupials D) shrews 11.
A) Rodentia B) Carnivore C) Lagomorpha D) Cetacea 12.
A) rabbits B) tigers C) kangaroos D) beavers 13.
<![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078757134/383923/gx.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (26.0K)</a>]]> A) only extinct mammals B) a food chain C) only present-day mammals D) evolution of mammals 14.
A) loss of rainforest on other continents; shortage of food B) continental drift; wide variety of competing mammals C) continental drift; isolation from competing mammals D) loss of rainforest on other continents; surplus of food 15.
A) Placental mammals have a larger cerebral cortex. B) Marsupials have a larger cerebral cortex. C) Marsupial young must cling to mother's fur. D) Placental mammals have developed more complex social behaviors.
.
