Which of These Animals Does Not Have a Closed Circulatory

question 24

Multiple Choice

Which of these animals does not have a closed circulatory system?

• A) Earthworm
• B) Fly
• C) Leeches (a type of annelid)
• D) Frogs
• E) Killer whales

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Definitions:

Descriptions

Refer to the detailed explanation or illustration of the nature, properties, or functioning of something.

Control Group

In experimental research, a group of subjects that do not receive the experimental treatment, serving as a comparison for evaluating the effect of the treatment.

Experimental Treatment

A procedure or therapy that is being tested and has not yet been proven effective.

Autonomy

The capability of an individual or system to make decisions independently, without external influence or control.