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

question 32

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.
-Cycliophorans have two types of larvae. One type of larva is produced when the digestive system of a female is impregnated by a male. The digestive system then collapses and develops into a larva, which swims away in search of a new host after the surrounding female dies. Which is the embryonic tissue that is apparently most important in forming this type of larva?

• A) mesohyl
• B) mesoderm
• C) ectoderm
• D) endoderm
• E) mesoglea

Recognize the importance of opportunities for growth and learning in job satisfaction.

Understand the theoretical underpinnings of job satisfaction, including equity and affective events theories.

Recognize how cultural and personality differences affect perceptions of equity and job satisfaction.

Understand the concept of demand-side market failure and the circumstances that lead to it.