1 A) unicellular B) heterotrophic C) segmented D) invertebrate 2 A) by eating crabs B) by getting food from crabs while protecting them C) by getting food from crabs without affecting them D) by competing with crabs for food 3 A) habitat changes B) anatomical features C) population growth D) eating habits 4 A) nervous system B) anus C) mouth D) tail 5 A) coelom B) endoderm C) ectoderm D) protostome 6 A) symmetry B) cephalization C) the evolutionary tree D) ectoderm 7 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383949/fi.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"> (10.0K)</a>]]> A) mesodermic symmetry B) asymmetry C) radial symmetry D) bilateral symmetry 8 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383949/fn.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"> (7.0K)</a>]]> A) two different theories of cnidarian ancestry B) polyps and medusae merged into one structure C) two different species of cnidarians D) a single evolutionary theory 9 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383949/fk.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) reproductive structure in sponges B) reproductive structure in cnidarians C) feeding structure in sponges D) feeding structure in cnidarians 10 A) detection of chemical signals B) reaction of epithelial-like cells C) closure of pores D) impulse of a nerve fiber 11 A) cephalization B) budding C) regeneration D) fragmentation 12 A) release of sperm, growth of larvae, new medusae B) growth of larvae, formation of eggs and sperm C) growth of polyps, release of sperm, growth of larvae D) formation of medusae, growth of larvae and polyps 13 A) cell number decreases; amount of cytoplasm increases B) cell number increases; amount of cytoplasm remains C) cell number remains the same D) cytoplasm disappears 14 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078695104/383949/fh.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"> (31.0K)</a>]]> A) 2-cell stage B) 16-cell stage C) gastrula D) sperm cell 15 A) has no endoderm B) has multiple body cavities C) has no ectoderm D) lacks a body cavity
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