Question

Which one of the following sets, includes all homologous organs?

• A. Hind leg of pig, duck and kangaroo
• B. Wings of bat, butterfly and bird
• C. Sting of honey bee, scorpion and snake
• D. Tail of rat, peacock and cockroach

Answer 1

The correct option is A Hind leg of pig, duck and kangaroo

Homologous organs are those that have same internal bone structures, but their function differs.
Examples of the homologous organs are wing of bat, lateral fin of whale, human arm. They all have similar bone structure layout, but they carry out distinct functions. Homologous structures mean they had come from a common ancestor. Hind leg of pig, duck and kangaroo are examples of homologous organs as they have same internal bone structures, but their function differs. Thus, option A is correct.
Wing of the bat, butterfly and bird are examples of analogous organs as basically have the same function but not the same underlying structure. Thus, option B is wrong.
Snake does not have stings and cockroach does not have the tail.