The organs of many animals are so reduced in size that they are just traces, of homologous organs in other species. These organs are called ..... organs .

MODERN THEORY OF EVOLUTION

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

The organs of many animals are so reduced in size that they are just traces, of homologous organs in other species. These organs are called ____ organs .

A	vestigal
B	homologous
C	structural
D	lost

Explanation:

Detailed explanation-1: -A vestigial structure is a biological structure that has lost a major ancestral function and is usually drastically reduced in size. Well-known examples include the eyes of blind cave fishes and blind cave salamanders, and the diminutive wings of kiwis and emus.

Detailed explanation-2: -Homologous organs are organs which have similar functions but different origins. The vestigial organs no longer have a purpose in the current form of an organism of the given species.

Detailed explanation-3: -Vestigial structures are homologous to fully functioning structures inherited by related lineages. Thus, they provide strong evidence of common ancestry and can help us trace the evolutionary origin of the species with the vestigial structures.

Detailed explanation-4: -Structures that have no apparent function and appear to be residual parts from a past ancestor are called vestigial structures. Examples of vestigial structures include the human appendix, the pelvic bone of a snake, and the wings of flightless birds.

There is 1 question to complete.