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Lecture 5 Animal Evolution – The Invertebrates. b. Flukes. parasitic worms withdraw nutrients from living cells or tissues sexual & asexual life cycles with 1-4 hosts. snail/clam; host for larval/juvenile stages. vertebrates; hosts that harbor the mature stage of flukes .
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b. Flukes • parasitic worms • withdraw nutrients from living cells or tissues • sexual & asexual life cycles with 1-4 hosts. • snail/clam; host for larval/juvenile stages. • vertebrates; hosts that harbor the mature stage of flukes .