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 best describes natural selection?

  1. A populations gene frequencies change over time.

  2. Individuals develop useful adaptations in response to environmental stress.

  3. Individuals with the most favorable traits survive and reproduce.

  4. Some individuals in a population will survive longer than other members of the population.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Natural selection is a process governed by changes in environmental factors, these factors produce stress on the organisms. That compels the organisms to undergo changes, in case the organism undergoes changes suitable to the environment, that is, it is suited to survive in the environment will also pass on those traits to the next generation, until the next change occurs. This is natural selection.

So, the correct answer is 'Individuals with the most favorable traits survive and reproduce'

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

The statement 'Nothing in biology makes sense except in the light of evolution' was given by

  1. A.I. Oparin

  2. Th. Dobzhansky

  3. Joseph Hooker

  4. Charles Darwin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

"Nothing in Biology Makes Sense Except in the Light of Evolution" is a 1973 essay by the evolutionary biologist and Russian Orthodox Christian Theodosius Dobzhansky, criticising anti-evolution creationism and espousing theistic evolution.

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

Industrial melanism was highlighted by

  1. Mimosa pudica

  2. Triticum aestivum

  3. Biston betularia

  4. Rock python

  5. Polar bear
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biston betularia is the common peppered moth, which was used to study industrial melanism in Britain. The melanic form and lighter coloured form are identical in all respects except for their body colour. Their frequency of occurrence changed with the industrial revolution in Britain.

so, the correct answer is 'Biston betularia'

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

The most accepted theory of organic evolution is

  1. Natural selection theory

  2. Phase theory

  3. Synthetic theory

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

In the 20th century conception of evolution being caused by a number of complex and often interacting processes. This is essentially a combination of Darwin's concept of natural selection, Mendel's basic genetics, along with the facts and theories of population genetics and molecular biology. So, this theory explains almost all factors related to organic evolution. Hence, this is the most accepted theory as compared to others.

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

Which is not a pre-zygotic isolation mechanism?

  1. Geographical isolation

  2. Ecological isolation

  3. Seasonal isolation

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

Sterility of hybrid is never a pre - zygotic isolation mechanism.Hybrid zygotes sometimes develop into adults, such as mules (hybrids

between female horses and male donkeys), but the adults fail to develop

functional gametes and are sterile.

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

Biological species concept emphasizes on

  1. Geographical isolation

  2. Reproductive isolation

  3. Physiological isolation

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

Members of species can interbreed naturally. This definition has some exceptions like animals obtained by interbreeding of animals of two species, this definition does not cover asexually reproducing organisms. However, among the options given best answer is Reproductive Isolation.

So, the correct answer is 'Reproductive isolation'

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

One of the important consequence of geographical isolation is

  1. No change in the isolated fauna

  2. Preventing Speciation

  3. Speciation through reproductive isolation

  4. Random creation of new species
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If species are geographically isolated and separated for long period of time, they may lose ability to interbreed and produce fertile offsprings. Thus leading to formation of new species

So, the correct answer is 'speciation through reproductive isolation'

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

Which of the following is related with reproductive isolation?

  1. Genetic isolation

  2. Temporal isolation

  3. Behavioural isolation

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

Genetic isolation exists when two populations are so different genetically that they cannot produce fertile offspring (or any offspring at all).
Temporal isolation is genetic isolation achieved due to temporal differences in breeding.
Behavioral

Isolation is a form of reproductive isolation in which two populations

have differences in courtship rituals or other types of behavior that

prevents them from interbreeding




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

As per modern synthetic theory organic evolution depends upon

  1. Mutation, reproductive isolation and natural selection

  2. Gene recombination and natural selection

  3. Mutation and natural selection

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

The synthetic theory of evolution is based on gene mutation, gene recombination, natural selection, genetic drift, isolation.(Other factors-migration, hybridisation,chance)

  1. Mutation, recombination, natural selection, genetic drift and isolation are involved in natural selection.
  2. Mutation is an important source of variation that fulfills gene pool and remains a base to polygenic or multi-factorial inheritance.
  3. The process of micro-evolution is governed by natural selection and gene flow is affected by reproductive isolation.
  4. Evolution is governed by genetic drift.
  5. Micro-evolutionary factors create new species.