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Objective 1.
Describe how the prominent characteristics of platyhelminths andnematodes promote their survival and reproduction.

Objective 4.
List the characteristics of flatworms and roundworms more advancedthan those of more primitive phyla.

Objective 6.
Understand the difference between acoelomate, pseudoceolomate, andcoelomate and know which phyla are associated with each.

j. Consider objective 1 listed at the beginning of this exercise.How could being monoecious contribute to the evolutionary successof flatworms in their environment?

k. Planarians have a head. In biological terms, what constitutes a“head”? How does it relate to objectives 1, 4, and 6?

The cuticle of Ascaris is flaky and tough. Consider objective 1listed at the beginning of this exercise. What might be an adaptiveadvantage of a thick and tough cuticle?

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Jarrod Robel
Jarrod RobelLv2
28 Sep 2019

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