Question

What part of the earthworm's anatomy is a good example of the property of—? a. The fact that it has a head. b. The fact that it has a closed circulatory system. c. The fact that many aspects of its structure are repeated in groups sequentially down the body. d. All of answers a-c are good e Ies of segmentation. e. None of answers a-c are good e Ies of segmentation.

Answer 1

The fact that many aspects of its structure are repeated in groups sequentially down the body proves that the earthworm’s anatomy is a good example of the property of segmentation.

Explanation:

The body of an earthworm consists of a head, tail and a middle region separated by segments which repeat as sequential units. The septa separate the segments which are joined. The unique feature of this segmented anatomy is that each of its segments will contain a repeat and complete set of organs because they are segmented both internally and externally. Externally muscular bristles repeat in each segment which aids in its movement.

An earthworm’s segments are ring-like structure which are layered and attached with each other. An earthworm can have approximately 100 to 150 segments in its body .