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Earn 100

Who developed the "Modern synthetic theory of evolution"?

Important Questions on Origin and Evolution of Life

EASY
Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
The mode of speciation mediated by geographical isolation is referred as
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Natural selection means
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
The idea of survival of the fittest was proposed by
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution

According to the Darwinian theory of natural selection, the rate of appearance of new forms is linked to the life cycle or the life span of an organism. Explain with the help of an example.

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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
A diploid plant has 14 chromosomes, but its egg cell has 6 chromosomes. Which one of the following is the most likely explanation of this?
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Transfer of genetic material between populations is best defined as:
MEDIUM
Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Assertion (A): Founder effect is a type of genetic drift
Reason (R): The change in the frequency of a gene that occurs merely by chance and not by selection, in very large population, is called genetic drift
MEDIUM
Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
What would you understand by geographical isolation? Will this be a major factor in the speciation of a self-pollinating plant species? Why or why not?
EASY
Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Variations caused by mutation, as proposed by Hugo de Vries, are:
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Descent of man & selection in relation to sex was written by ___.
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
"Survival of the fittest", explain the statement with the help of Darwin's theory.
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
The book “Process of organic evolution” was written by:
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
What is genetic drift? Give one example.
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution

Match the Column I with Column II and find the correct answer

  Column - I   Column - II
1 Aneuploidy p Increase in the whole set of chromosomes
2 Monoploidy q Loss or gain of a chromosome
3 Polyploidy r Two sets of chromosome
4 Diploidy s A single set of chromosomes
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
What is a gene pool?
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Briefly describe Sewall-Wright effect.
MEDIUM
Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Differentiate between allopatric and sympatric species.
MEDIUM
Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution

Statement I: The existence of deleterious genes within the populations is called genetic load.
Statement II: The changes in the frequency of a gene that occurs merely by chance in small populations is called genetic drift.

The correct option among the following is

EASY
Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Genetic drift
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Biology>Genetics and Evolution>Origin and Evolution of Life>Organic Evolution
Write salient features of Darwin's theory of Evolution