As You Are Walking Along a Beach, You Find an Animal

question 6

Multiple Choice

As you are walking along a beach, you find an animal and believe that it belongs to the class Asteroidea. Which of the following characteristics would support your hypothesis that the animal is a sea star and not another type of echinoderm?

• A) It is pentaradially symmetric.
• B) It feeds on other animals.
• C) It has a hydrostatic skeleton, formed from its water vascular system.
• D) Its central region is not well delineated from its appendages.

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Definitions:

Retractor

A surgical instrument used to hold back underlying organs and tissues, so that body parts under operation are easily accessible.

Tissue

A collection of similar cells and fibers forming a structure in the body.

Operative Site

The specific area on the body where surgery is performed.

Aseptic Technique

A set of practices aimed at preventing contamination from pathogens to minimize the risk of infection, particularly in medical procedures.