Chapter 15, Problem 10A

Solution

To determine:

The incorrect term which is italicized in the given sentence and replace it with the suitable word to make it correct.

Introduction:

Evolution can be defined as the unrolling of nature that brings about an orderly change from one form to another which results in the descendants to become different from the ancestors.

The evidences that support evolution are comparative morphology, anatomy and embryology, paleontology, geographical distribution, taxonomy, connecting links, cytology, biochemistry, physiology and genetics.

The word which can be filled to replace italicized word is vestigial organ. So the correct sentence is Anatomical parts that have reduced function in an organism are vestigial organs.

Analogous organs are those which are different in structure but perform same function. It confirms convergent evolution. Example: Wing of butterfly and wing of bird, fins of fishes and flippers of whales, leaves and cladodes in plants have different structure but perform same function.

Vestigial organs are useless remnant of structure or organs which might have been large and functional in ancestors. Examples are vermiform appendix, nictitating membrane, auricular muscle, wisdom teeth, vestigial tail, mammary glands in males and body hairs.