what is the homology between forelimb of frog, forelimb of lizard and wing of a bird?what does it indicate state one function each of forelimbs (a)human being (b)birds

Open in App

Solution

The homologous organs are similar in form (or are embryologically similar), but perform different functions in different organisms. The bone structure observed in wings of birds, forelimbs of lizard and frog is similar, but perform different functions. They belong to the same group of animals, the vertebrates, and therefore, exhibit homology.
The function of forelimb (hands) of humans is to perform variety of tasks like writing, holding etc. The forelimbs of birds are modified into wings and enables bird to fly.

Suggest Corrections

Similar questions

Q. Distinguish between analogous organs and homologous organs.

Identify the analogous and homologous organs amongst the following:

Wings of an insect, wings of a bat, forelimbs of frog, forelimbs of human.

Q. Forelimbs of frog and lizard are the example of the ............ organs.

Q. Forelimbs of cat and lizard are used for walking and forelimbs of whale is used for swimming. Identify the correct statement based on this information.

Statement 1: They are an example of homologous organs

Statement 2: They are an example of analogous organs.

There are five animals A, B: C, D and E. The animal A uses its modified forelimbs for flying. The animal B uses its forelimbs for running whereas the animal C uses its forelimbs for grasping. The animal D can live on land as well as in water and uses its forelimbs to prop up the front end of its body when at rest. The animal E which respires by using spiracles and tracheae uses wings for flying but its wings are analogous to the modified forelimbs of animal A.
(a) What could the animals A, B, C, D and E be?
(b) Why are the forelimbs of animals A, B, C and D called homologous organs?
(c) What does the existence of homologous organs in animals A, B, C and D tell us about their ancestors?
(d) Why are the modified forelimbs of animal A and the wings of animal E called analogous organs?
(e) State whether animals A and E have a common ancestor or not.

Q. Forelimbs of a cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used of :

Join BYJU'S Learning Program