The Hydrostatic Skeleton of the Earthworm Allows It to Move

question 44

Multiple Choice

The hydrostatic skeleton of the earthworm allows it to move around in its environment by

• A)walking on its limbs.
• B)crawling with its feet.
• C)swimming.
• D)using peristaltic contractions of its circular and longitudinal muscles.
• E)alternating contractions and relaxations of its smooth muscle.

---

Definitions:

Normal Curve

A bell-shaped curve that represents the distribution of a dataset where most of the observations cluster around the central peak and the probabilities for values further away from the mean taper off equally in both directions.

Binomial Probability

The probability of achieving a specific number of successes in a fixed number of independent trials, each with the same probability of success.

Binomial Distribution

A probability distribution that summarizes the likelihood that a value will take one of two independent states under a given number of observations.

Normal Distribution

A bell-shaped frequency distribution curve that is symmetrical about the mean, representing the distribution of many types of data.