What is competition in nature ? How does it affect the plant and animal life ? Mention some examples.

Solution

Competition is defined as struggle for existence between organisms of the same species, variety, genus or family etc. The reason for struggle in production of a large number of individuals by an organism. As the space and food is limited, hence the individuals compete with one another.

As a result of struggle for existence, only the fittest survives while the weak ones die.

Due to change in the environment, an organism which survives, adapts itself to the changed environment. This brings variations in the organism.

The variations are the raw materials of evolution. By the inheritance of some of these variations in successive generations, new species are formed both in plants and animals, e.g. progeny of pea plant.

Some More Questions From Evolution Chapter

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Evolution

What is competition in nature ? How does it affect the plant and animal life ? Mention some examples.

Some More Questions From Evolution Chapter

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?

Evolution is a discontinuous process. Is it correct ?

Give the three key factors of the modern concept of evolution.

Which other term can be used for natural selection ?

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