Question

[3]
(a) Differentiate between analogous and homologous structures.

(b) Select and write analogous structures from the list given below:
(i) Wings of butterfly and birds
(ii) Vertebrate hearts
(iii) Tendrils of bougainvillea and cucurbita
(iv) Tubers of sweet potato and potato

Answer 1

[2]
(a)
$\begin{array}{cc}\text{Analogous Organs}& \text{Homologous Organs}\\ \text{(i) Structurally dissimilar}& \text{(i) Structurally similar}\\ \text{though perform similar}& \text{but perform different}\\ \text{function.}& \text{function.}\\ \text{(ii)They are a result of}& \text{(ii)They are a result of}\\ \text{convergent evolution.}& \text{divergent evolution.}\\ \text{(iii)Example: Wings of}& \text{(iii)Example: Wings of Bat}\\ \text{Butterfly and Birds.}& \text{and Fore limb of horse.}\end{array}$

(b) Analogous structures present in the list are [1]
(i) Wings of butterfly and Birds.
(ii) Tuber of sweet potato and potato.