Evolution Ques 76
An important evidence in favour of organic evolution is the occurrence of homologous structures
[2006]
(a) Analogous and vestigial organs
(b) Homologous structures only
(c) Homologous and analogous organs
(d) Homologous and vestigial organs
Show Answer
Answer : d
Hints & Solution
(d) Homologous organs represent convergent evolution. These are the organs belonging to different organisms of different species that may have dissimilar functions but they all have the same basic structure. On the other hand vestigal organs show that how a species evolved from its ancestors through the ages according to the use and disuse of organs. These are the organs which were sometimes functional in humans (or may be any other organisms) but during the course of evolution their utility gradually declined and now they are present as non-functional and vestigial organs.
BETA
