Question

When observing a wormlike organism in lab, you try to determine which phylum it belongs to....

When observing a wormlike organism in lab, you try to determine which phylum it belongs to. Which of the following represents a definitive characteristic that would provide you with an answer?

a)  an incomplete gut

b) a parasitic lifestyle

c) bilateral symmetry

d)a body cavity

Homework Answers

Answer #1

Ans. Option D is the correct answer.

EXPLANATIONS:- If we want to determine the phylum of the organism that is worm like , we would like to compare the body cavity. It is also called as the coelom. It is the space between the body wall and the gutter wall. On the basis of the body cavity, organism may be acoelomate, pseudocoelomate and coelomate.

If the worm like organism belong to the platyhelminthes phylum, it will have the acoelomate.

If it belongs to aschelminthes phylum, them it will be pseudocoelomate.

If it belongs to annalisa then it will be coelomate.

The rest of characters are almost same in the given wormlike phylum.

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