Use the Following Information to Answer the Question

question 80

Multiple Choice

Use the following information to answer the question.
The phylum Cycliophora was discovered in 1995. They are tiny organisms that live in large numbers on the outsides of the mouthparts and appendages of lobsters. The feeding stage permanently attaches to the lobster via an adhesive disk and collects scraps of food from its host's feeding by capturing the scraps in a current created by a ring of cilia. The body is saclike and has a U-shaped intestine that brings the anus close to the mouth. Cycliophorans are coelomates, do not molt (though their host does) , and their embryos undergo spiral cleavage.
Which of these, if discovered among cycliophorans, would cause the most confusion concerning our current understanding of cycliophoran taxonomy?

• A) if the ciliated feeding ring is a lophophore
• B) if embryos are diploblastic
• C) if the body cavity is actually a pseudocoelom
• D) if the organisms show little apparent cephalization

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Definitions:

Pathogen Hosts

Organisms that harbor pathogens, serving as a site for the pathogen to live, grow, and multiply, potentially causing disease.

Selection

The process by which certain traits become more prevalent in a population due to differential survival and reproduction of individuals who possess those traits.

Antagonistic Pleiotropy

A genetic trait that confers a benefit to an organism in one context but may be detrimental in another.

Mutations

Changes in the nucleotide sequence of an organism’s DNA, leading to genetic diversity and can cause new genes and alleles to arise.