Tag: neo darwinism

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Questions Related to neo darwinism

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

Which of the following variations are temporary and have nothing to do with the last or next generation?

  1. Hereditary variations

  2. Discontinuous variations

  3. Environmental variations

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Environmental variations are those variations which are merely due to environment. These variations are temporary and have nothing to do with the next generation. Hereditary variations are those variations which transfer to next generation. Discontinuous variations are sudden changes in organism which are also heritable.

So, the correct answer is 'environmental variations'

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

The Book "Process of Organic Evolution" was published by

  1. Lamark

  2. Darwin

  3. G.L. Stebbins

  4. Dobzhansky
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • The author of the book Process of organic evolution was G.L. Stebbins. This book includes an explanation of the synthetic theory of evolution.
  • The various concepts which are involved in the process of mutation and results in evolution.
  • The phenomena like recombination, variation, isolation, etc. are considered and explained with respect to evolution. 
Thus, the correct answer is option C.

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

Evolution will not occur if :

  1. There is no environmental influence.

  2. Genes are without effect.

  3. Somatic variations are not heritable.

  4. There is no genetic variations in individuals of a populations.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Evolution is the change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes that are passed on from parents to offspring during reproduction.

So, the correct answer is 'There are no genetic variations in individuals of a population'

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

Which is related to reproductive isolation?

  1. Genetic isolation

  2. Behavioural isolation

  3. Temporal isolation

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A subpopulation becomes reproductively isolated from its parental population. It is the formation of species without geographical isolation and these species are called sympatric speciation. It is reproductive, behavioural and temporal isolation.

So, the correct option is 'All of the above'.

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

Species are differentiated on the basis of ______________.

  1. Interbreeding

  2. Reproductive isolation

  3. Species diversity

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The biological species concept defines species based on the ability of individuals to interbreed and produce fertile offspring, which is maintained by reproductive isolation from other groups.

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

Isolation leads to ________.

  1. Species differentiation

  2. Evolutionary divergence

  3. Formation of analogous structures.

  4. Formation of similar traits
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Isolation, particularly reproductive or geographic, prevents gene flow between populations. This allows populations to diverge genetically, eventually leading to the formation of new species.

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

"Human population grows in geometric ratio while food materials increase in arithmetic proportion." It is a statement from :

  1. Darwin

  2. Bateson

  3. Amritya Sen

  4. Malthus

  5. Swaminathan
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Malthus gave the theory of principal of population which proposes that the human population grows in geometric ratio while food materials increase in arithmetic proportion.

So, the correct option is 'Malthus'.

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

Modern theory of evolution is based on :

  1. Mutations

  2. Genetic recombination

  3. Natural selection

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Synthetic theory is considered as Modern theory and the main contributor of this theory was G.L.Stebbins. They considered 5 factors, responsible for organic evolution. They are as follows

1.Mutation 
2.Genetic recombinantion
3.Chromosomal aberration
4.Reproductive isolation
5.Natural Selection
So, the correct answer is 'All the above'

Multiple choice zoology origin of life and organic evolution neo darwinism mechanism of evolution other theories of evolution

Which one does not help in understanding evolution?

  1. Genetic variation

  2. Natural selection

  3. Embryogenesis

  4. Isolation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

For understanding Evolution, we consider-

Genetic variation- These are changes in genes that are heritable, which might become useful for some, who get better adapted with habitat. 
Natural Selection- It is the process in which the individuals who are better suited for the environment leave behind more offsprings than the ones who are less suited. It is a key component in studying evolution.
Embryogenesis- It is the process and formation of an embryo. With the help of this, we're able to make links with different species on the basis of their embryos. 
Isolation is an important component in the process of Speciation. It doesn't help in understanding evolution. Hence, Option D is correct.