Question

solve please this problem ​

Answer 1

Answer:

lamarckism

1.Jean - Bepstite Lamarck proposed that morphological changes occurring in living organisms are responsible for the evolution.

2.The reason behind those morphological changes is the activities or laziness of that organisms .

3.He called this principal as ' use or disuse of organs ' .

4. Example ( l ) The neck of giraffe has become too long due to browsing of the leaves of the tall trees.

( ll ) Similarly the shoulder of irons ironsmith become too frequent because of the frequent hammering movements.

5.This is the examples of the aquaried changes and this changes are transferred from one generation to other generation. This is called as Lamarckism

Answer 2

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Lakamarckism:-

Lakamarckism was proposed by Jean baptiste de Monet lamarck in the 1744-1829 . This theory was based on the principle that all the changes occurring in the individual during life time are inherited by it's offspring .✔

Examples of lakamarckism:-

1. Evolution of giraffe:-

The ancestors of the giraffe looked like horse witg small necks and forelimbs . they lives in areas where there was no surface vegetation.✔

2. Aquatic birds with webbed toes:-

Aquatic birds such as ducks are believed to have evolved from terrestrial animals.✔

3. Flightless birds:-

It is believed that the ancestors of birds such as ostrich were able to fly . due to some environmental changes , they had a lot of food and were well protected . they stopped using their wings and as a result , the wings are became vestigial.✔