Question

difference between homeo logos and analogous state any five point very short​

Answer 1

Homologous- same evolutionary origin and different functions.

Analogous- different evolutionary origin but same function.

Examples of homologous organs are:

1. Wing of a bat and our forearm, or any upper limb. These structures have similar arrangement of bones but perform different functions according to their habitat adaptation.

2. In plants, all the stem modifications or all the root modifications are homologous with each other. Such structures serve different functions like support, food storage.

Analogous organs have the following examples:

1. Leaf tendril and stem tendril. Both these perform the function of coiling or support. But one is of foliar origin and the other if stem.

2. Wings of a bat and that of an insect. Bat wing is a bony structure with association with underlying muscles. Insect wing are, however, membranous extensions.

Answer 2

Homologous organs:

1.They differ morphologically.

2. They have similar internal structure.

3. They develop in related organisms.

4. Stages in the development are similar.

5. They perform different functions.

6. They have similar developmental pattern.

7. Homologous organs show adaptive radiation (divergent evolution).

Analogous Organs:

1. They show superficial resemblance.

2. Their internal structure is quite different.

3. They develop in unrelated organisms.

4. Stages in the development are different.

5. They have similar functions.

6. They have dissimilar developmental pattern.

7. Analogous organs show convergent evolution.

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