In Order for an Earthworm to Lengthen Several Contiguous Segments

question 23

Multiple Choice

In order for an earthworm to lengthen several contiguous segments of its body, it must

• A)contract its longitudinal muscles, which pulls up the chaetae and moves the body fluid perpendicular to the long axis of the worm.
• B)contract its longitudinal muscles, which extends the chaetae into the surrounding soil and moves the body fluid parallel to the long axis of the worm.
• C)contract its circular muscles, which extends the chaetae into the surrounding soil and moves the body fluid parallel to the long axis of the worm.
• D)contract its circular muscles, which pulls up the chaetae and moves the body fluid parallel to the long axis of the worm.

---

Definitions:

Chi-square Test

A statistical test used to determine if there's a significant difference between the expected frequencies and the observed frequencies in one or more categories.

Economic Concerns

Issues or problems relating to the economy, including unemployment, inflation, and economic policy.

Proportion

A fraction or percentage that represents a part of a whole or a total.

Test

An examination or evaluation conducted to determine the presence, quality, or truth of a specific characteristic, hypothesis, or condition.