The Most Recently Discovered Phylum in the Animal Kingdom (1995)

question 64

Multiple Choice

The most recently discovered phylum in the animal kingdom (1995) is the phylum Cycliophora. It includes three species of 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 sac-like and has a U-shaped intestine that brings the anus close to the mouth. Cycliophorans are eucoelomate, do not molt (though their host does) , and their embryos undergo spiral cleavage.
-What is true of the feeding stage of cycliophorans?
1) It is chemoheterotrophic.
2) It is sessile.
3) It captures food in a manner similar to that of animals with lophophores.
4) It has radial symmetry.

• A) 1 and 2
• B) 1 and 3
• C) 2 and 4
• D) 1, 2, and 3
• E) 2, 3, and 4

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Definitions:

Psychological Reactance

A behavioral response to perceived threats to one’s autonomy, often resulting in opposition to being controlled.

Boomerang Effect

A situation where the opposite of the intended effect occurs, especially in a social or psychological context, such as when trying to persuade results in resistance.

Negative Attitude Change

The process by which an individual's positive feelings about an object, person, or idea shift to become more negative.

Public Compliance

Involves outwardly conforming to the norms or behaviors of a group while privately maintaining personal dissent or disagreement.