Assertion: Lamarck's theory of organic evolution states that use and disuse of organs and changes in environment cause inheritable variations.
Reason: The principle of inheritance of acquired characters.
Assertion: Lamarck's theory of organic evolution states that use and disuse of organs and changes in environment cause inheritable variations.
Reason: The principle of inheritance of acquired characters.
The correct option is B Both assertion and reason are true but reason is not the correct explanation of assertion
The correct reasons for the development of variations due to use and disuse of organs and changes in environment are as follows:
According to Lamarck, the organ which is used continuously will develop whereas the organ which is not used will either remain the same or degenerate.
Changes in environment necessiate the development of some new organs or the disuse of existing organs. The internal vital force in all organisms causes the devlopment of certain variations or organs in an organism's life time, which will then be inherited by its offspring.
Inheritance of Acquired Characters: Whatever character an individual acquires in its life time due to internal vital force, effect of environment, new needs and use and disuse of organs, they are transmitted to next generations.
Both assertion and reason are true but reason is not the correct explanation of assertion
The correct reasons for the development of variations due to use and disuse of organs and changes in environment are as follows:
According to Lamarck, the organ which is used continuously will develop whereas the organ which is not used will either remain the same or degenerate.
Changes in environment necessiate the development of some new organs or the disuse of existing organs. The internal vital force in all organisms causes the devlopment of certain variations or organs in an organism's life time, which will then be inherited by its offspring.
Inheritance of Acquired Characters: Whatever character an individual acquires in its life time due to internal vital force, effect of environment, new needs and use and disuse of organs, they are transmitted to next generations.
