Assertion : Old age is not an illness. It is a continuation of life with decreasing capacity for adaptation.
Reason : Cessation of mitosis is a normal genetically programmed event.

If both Assertion and Reason are true and the reason is the correct explanation of the assertion

If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

If Assertion is true statement but Reason is false

If both Assertion and Reason are false statements

Solution

If Assertion is true statement but Reason is false

Old age is the result of ageing or senescence which is defined as the progressive deterioration in structure and function of the body cells, tissues, organs and organ systems of the organism with their advancing age. Also, the immune system loses its ability to effectively deal with the antigens. This reduces the resistance as well as adaptation of the body.

Cessation of mitosis is not as such a genetically programmed event. During ageing, there is a decrease in multiplication of cells, though it differs in various tissues.

Some More Questions From Evolution Chapter

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Evolution

Some More Questions From Evolution Chapter

What were the units of life according to the early Greek thinkers ?

Mention the type of nutrition in the cells originated first during the origin of life.

Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

What is meant by the term fossil ?

What is the type of evolution in which the same structure developed along different directions due to adaptations to different needs ?

Name the different eras of geologic time scale.

What is single step large mutation?

Consider a thorn in Bougainvillea and a tendril in cucurbita. Are these two organs homologous or analogous ? Give reason.

Give two examples that represent adaptive radiation.

Which theory attempts to explain to us the origin of universe?

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