Flatworms Have No Coelom

question 239

Multiple Choice

Flatworms have no coelom.Gene sequencing shows that their closest relatives are the bryozoans (which are coelomate) and the rotifers (which are pseudocoelomate) .Which of the following is a legitimate conclusion?

• A) Flatworms and rotifers form a monophyletic group.
• B) Flatworms and bryozoans form a monophyletic group.
• C) There must be flaws in the gene sequence analyses.
• D) Both a and c
• E) None of the above

---

Definitions:

Physical Pain

An uncomfortable sensation and emotional experience linked to actual or potential tissue damage.

Proximity Effect

A principle suggesting that physical or psychological closeness between individuals increases the likelihood of forming relationships or bonds.

Immediate Neighbors

Refers to the entities or elements directly adjacent to a central point or position, often used in spatial, geographical, or network contexts.

Evolutionary Motives

The underlying biological and genetic purposes that drive behaviors, believed to aid in survival and reproduction.