Select Subject:
filter

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.


Genetic drift is :
1. random changes in gene frequency in a population
2. generational fluctuations in gene frequencies that produce no effect
3. changes due to interbreeding with other species populations
4. the effect of mutations as they spread through neighbouring populations

Subtopic:  Hardy Weinberg Law |
 85%
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.


Genetic drift is most powerful in
1. changing environments
2. small populations
3. large populations
4. stable environments

Subtopic:  Sources of Variation |
 73%
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.


The concept of genetic bottlenecks includes which of the following?

1. a loss of genetic diversity in descendent populations
2. extensive gene flow
3. sharing of genetic material between two populations
4. increased ability to resist new diseases

Subtopic:  Difference Between Drift & Selection | Population Genetics | Concept of Isolation |
 61%

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

Hints

Which statement most accurately reflects what population geneticists refer to as "fitness"?

1.  Fitness is the measure of an organism's adaptability to various habitats.
2.  Fitness reflects the number of mates each individual in the population selects.
3.  Fitness refers to the relative health of each individual in the population.
4.  Fitness is a measure of the contribution of a genotype to the gene pool of the next generation.
Subtopic:  Darwin's Theory |
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.


Organisms that are least likely to experience extinction over the long term are most likely to be found in:

1. areas inhabited by humans 2. very stable habitats
3. desert 4. savanna
Subtopic:  Importance of Biodiversity |
 73%
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 one of the following would cause the Hardy-Weinberg principle to be inaccurate?

1. The size of the population is very large.
2. Individuals mate with one another at random.
3. Natural selection is present.
4. There is no source of new copies of alleles from outside the population.

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 |
 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.


Which one of the following populations would most quickly lead to two groups with few shared traits?

1.  a population with disruptive selection
2.  a population with directional selection
3.  a population with stabilizing selection
4.  a population with no selection

Subtopic:  Concept of Organic Evolution: Evidence: 1 | Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence: 3 | Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 |
 78%
From NCERT

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

Hints

Which of the following is used as an atmospheric pollution indicator?

1. Lepidoptera 2. Lichens
3. Lycopersicon 4. Lycopodium
Subtopic:  Natural Selection |
 96%
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