Question

Wings of bat/bird and insect show
A. Analogy
B. Homology
C. Connecting link
D. Atavism

Answer 1

Hint: Wings of birds and insects are used for flying. Wings help them to uplift their body while flying.

Complete answer: Organisms that do not have similar structural or physical similarity but have a similar function are known to be analogous. Wings of birds and insects are structurally dissimilar but are functionally similar, that is, they use wings to fly. Eyes of mammals and octopus are analogous in nature, whereas the flippers of penguins and dolphins are also analogous structures.
a) Homology is defined as organisms having a similar structure but dissimilar function. Thorns of bougainvillaea and tendrils of Cucurbita are some of the examples of homologous.
b) A connecting link is defined as the intermediate or the link which joins two groups of organisms. It joins organisms of one class to the organisms of another class. For example, Neopilina is a connecting link between Mollusca and Arthropoda and Archeopteryx is a connecting link between birds and reptiles.
c) Atavism is defined as an occasional reappearance of a structure or behaviour in organisms from their previous generations. Presence of tail in some human babies, the inheritance of characters or similar body structure from their ancestors are some examples of atavism.
Hence, the correct answer is option A.

Note: Missing link provides knowledge of their connection with present species. It mostly resembles fossils which provide evidence for the presence of the previous species. Evolution is a change in the heritable characteristics of biological populations over successive generations.