Select Subject:
filter

What is genetic equilibrium?

1. When all the alleles of a gene are present in a population in equal frequencies
2. When the number of heterozygotes in a population is equal to the number of either of the homozygote.
3. When the number of heterozygotes in a population is equal to the number of either of the homozygote.
4. When the frequency of particular genes or alleles remains constant in a population through generations

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 |
 79%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Which of the following is the most important precondition for speciation to occur?

1. Reproductive isolation 2. A crash of the population size
3. Adaptive radiation 4. Random mating
Subtopic:  Concept of Speciation |
 59%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Some of the marsupials of Australia resemble equivalent placental mammals that live in similar habitats on other continents. This is an example of:

1.Convergent evolution2.Divergent evolution
3.Saltatory evolution4.Adaptive radiation

Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
 65%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Which of the following is not a precondition for Hardy-Weinberg Equilibrium?

1. The population should be large

2. The mating should be assortative

3. There is no gene flow into or out of the population

4. All offspring should be equally fertile.

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 |
From NCERT
Please attempt this question first.
Hints

The first genetic code of life was based on:

1.DNA2.RNA
3.Proteins4.Lipids

Subtopic:  Definition & Types of Evolution | Cosmic Evolution | Examples of Chemical Evolution | Urey & Miller Experiment | Other Theories of Origin of Life |
 76%

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

For the origin of life, which of the following is not a precondition needed to be fulfilled by the protobionts under consideration?

1. They should have been able to totally isolate themselves from the general environment.
2. They should have been able to replicate.
3. They should have acquired a perpetual source of energy. 
4. Their replication should have been subject to error via mutation.

Subtopic:  Definition & Types of Evolution | Cosmic Evolution | Examples of Chemical Evolution |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

For the stability of the organic compounds, Oparin opined that, probably:

1. UV radiation never reached the surface of the primeval Earth
2. the primeval Earth was in a molten state
3. the primeval Earth atmosphere was reducing rather than oxidizing
4. plenty of energy sources were available for chemical reactions to occur
Subtopic:  Definition & Types of Evolution | Cosmic Evolution | Examples of Chemical Evolution |
 76%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Natural selection operates on the _______ of an individual organism.

1.survival2.environment
3.genotype4.phenotype

Subtopic:  Concept of Organic Evolution: Evidence |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Stabilizing selection acts to _________ in a species' population.
1. elaborate new traits
2. alter traits
3. push for directional change
4. maintain a certain phenotype

Subtopic:  Modern Theory of Evolution | Natural Selection |
 79%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Gene flow is :
1. the migration of species populations to new areas
2. the exchange of genes during fertilization
3. mating between close relatives
4. the movement of genes between species populations

Subtopic:  Population Genetics | Genetic Basis of Adaptation | Hardy Weinberg Law |
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Select Subject:
filter