Adaptive Radiation

Forelimbs of whatle bat, cheetah and duman do not show- a. Similiarities in the pattern of bones b. Adaptive radiation c. Analogou organs d. Convergent evolution e. Divergent evolution f. Different structuress evolving for sam funstions

Assertion: Darwin's finches of Galapagos islands have different types of modified beaks according to their food habits. Reason: Adaptive radiation, leads to development of different functional structure from a common ancestral form.

....... P ......... represent one of the best examples of Adaptive radiation . Another example is ....... Q........A number of .....Q..... , each different from the other evolved from an ancestral stock , but all within the Australian island continent . When more then one adaptive radiation appeared to have occurred in an isolated geographical area ( representing different habitats ) , one can call this ..... R.........

(a) Explain adaptive radiation with the help of a suitable example. (b) City an example where more than one adaptive radiations have occurred in an isolated geographical area. Name the type evolution your example depicts and state why it is so named.

A: Placental wolf and Tasmanian wolf (a marsupial) show convergent evolution. R: Like marsupials placental mammals in other parts of world also exhibit adaptive radiation in evolving into varieties of such placental mammals each of which appears to be similar to a corresponding marsupial.

(i) Identify any two marsupials from the list given below: (a) Lemur (b) spotted cuscus (c) Flying phalanger (d) bobcat (e) tasmanian wolf (f) mole (ii) Australian marsupials exhibit adaptive radiation." Justify the statement.

Assertion :-Tasmanian wolf and Placental wolf are the good example of convergent evolution. Reason :- More than one adaptive radiation appeared to have occured in an isolated geographical area, (representing different habitats) one can call this convergent evolution.