1 A) pheromones B) endoskeletons C) exoskeletons D) spiracles 2 A) regeneration B) molting C) biogenesis D) regulation 3 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383951/fw.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"> (13.0K)</a>]]>
A) Arthropods have no ancestral relation to annelids. B) Arthropods are not protostomes. C) Arthropods have body cavities. D) Arthropods have endoskeletons. 4 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383951/fx.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"> (12.0K)</a>]]>
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A) aquatic habitat B) cephalothorax C) lack abdomen D) fused segments 5 A) Mandibles enable biting and chewing. B) They never utilized filter feeding. C) They lack a complete one-way digestive system. D) The exoskeleton produces digestive enzymes. 6 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383951/fz.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"> (34.0K)</a>]]>
A) arachnid B) crustacean C) scorpion D) horseshoe crab 7 A) cephalothorax B) chelipeds C) chelicerae D) pedipalps 8 A) spinnerets B) pedipalps C) swimmerets D) chelipeds 9 A) cannot digest nutrients internally B) secrete digestive enzymes onto prey C) spinning web is learned behavior D) digestion only occurs internally 10 A) They are crustaceans. B) They are parasites. C) They harbor disease-causing agents. D) They are arachnids. 11 A) mollusk B) crustacean C) arthropod D) protist 12 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383951/ga.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"> (34.0K)</a>]]>
A) compound eye, legs, wings B) legs, wings, mouthpart C) legs, antennae, wings D) head, thorax, abdomen 13 A) Wings have no veins. B) Wings are made of a double membrane of chitin. C) Wings are a different material than the exoskeleton. D) Veins make wings weaker. 14 A) wings B) legs C) mouthparts D) thorax 15 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383951/gb.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>]]>
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A) Complete metamorphosis produces no eggs. B) Incomplete metamorphosis has a pupa stage. C) Complete metamorphosis has a pupa stage. D) Incomplete metamorphosis has no immature stage.
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