Vestigial organs are rudimentary or poorly developed organs or body parts that are non-functional and useless to the possessor but were functional in the ancestors and are fully developed and functional in related forms.
For example, in man, about 90 structures are present which are vestigial, e.g. Wisdom teeth, vermiform appendix etc.
Explain the following :
(i) Grafting
(ii) Vital capacity
(iii) Ureotelism
(iv) Epigeal germination.
