Question

Consider the following statements.

I. Homologous organs are common origin with different functions.

II. Analogous organs are different origin but perform similar function in different organisms.

III. Vestigial organs are non-functional and rudimentary organs in an organism which are fully developed and functional in phylogenetically related organisms.

Which of the statements given above are correct?

(a) I and II

(b) II and III

(c) I and III

(d) I, II and III

Answer 1

(d) I, II and III

Homologous organs are unique organs and have an alternate aim, perform different functions, and have the same origin. Example-arms of humans. That means they may have similar origins but have dissimilar functions. The organs which have similar function but are different in their structure and origin are called analogous organ.