Evolution always occurs through natural forces. It cannot be carried out through artificial selection.
Fill in the following blanks with suitable words : (a) The human forelimb and bat's forelimb are an example of ___ organs whereas an insect's wing and a bat's wing are an example of ______ organs. (b) The evolution of the eye is an example of evolution by ___ (c) The scientific name of all human beings is ___ (d) Broccoli has evolved from ___ by the process of artificial selection. (e) The theory of natural selection for evolution was proposed by ___