You Experiment with a Live Earthworm and Notice the Following

question 26

Multiple Choice

You experiment with a live earthworm and notice the following results: - With an intact earthworm,when you "poke" a segment,it contracts.
- When you cut off the first segments containing the brain,the remaining worm still crawls.
- When you cut the nerve in each septal wall,contractions continue.
- If you cut the body wall,leaving the nerve cord intact,crawling still continues.
- When you cut both the body wall nerve and the nerve cord,there are no longer any coordinated contractions.
What is a reasonable conclusion?

• A) An earthworm's brain controls crawling.
• B) The ventral nerve cord controls all contractions.
• C) Mechanical stimulation of each segment triggers contractions.
• D) Earthworms use ventral nerve cord to coordinate contractions along the length of the worm and mechanical stimulation of each segment to triggers segmental responses during crawling.
• E) None of the choices are correct.

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A business arrangement granting a single entity the right to market a company's goods or services within a specified territory.

Deregulation

The process of reducing or eliminating government controls or restrictions on industries to promote efficiency and competition.

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Policies and rules implemented by governments to control or manage the activities, standards, and behaviors of industries and their participants.

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