Define the terms:
1. variations
2.Mutations
3.Natural selection
4.Accidental selection
5.Geographical isolation
6.Reproductive Isolation
(chapter:Heridity and Evolution)
(class:10th)
Pls answer the question......
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•Natural selection :
The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.
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•Reproductive isolation :
The mechanisms of reproductive isolation or hybridization barriers are a collection of mechanisms, behaviors and physiological processes that prevent the members of two different species that cross or mate from producing offspring.
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•Geographic isolation :
Allopatric speciation or geographic speciation is speciation that occurs when biological populations of the same species become vicariant.
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•Mutation:
the changing of the structure of a gene, resulting in a variant form which may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.
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•Variation:
Different changes in the human body that occur in sexual reproduction due to the mechanism of DNA copying.
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•Accidental selection:
Refer the above Pic. for this DEFINITION.
•••••••••••••••••••••••••••••••••••°••••••••
hope helped..!! ☺
••••••••••••••••••••••••••••••••••
•Natural selection :
The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.
•••••••••••••••••••••••••••••••••••••••••
•Reproductive isolation :
The mechanisms of reproductive isolation or hybridization barriers are a collection of mechanisms, behaviors and physiological processes that prevent the members of two different species that cross or mate from producing offspring.
•••••••••••••••••••••••••••••••••••••••••
•Geographic isolation :
Allopatric speciation or geographic speciation is speciation that occurs when biological populations of the same species become vicariant.
•••••••••••••••••••••••••••••••••••••••••
•Mutation:
the changing of the structure of a gene, resulting in a variant form which may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.
•••••••••••••••••••••••••••••••••••••••••••••
•Variation:
Different changes in the human body that occur in sexual reproduction due to the mechanism of DNA copying.
•••••••••••••••••••••••••••••••••••••••••••••••
•Accidental selection:
Refer the above Pic. for this DEFINITION.
•••••••••••••••••••••••••••••••••••°••••••••
hope helped..!! ☺
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