Theory of Natural Selection

Q. What is Genetic Drift ? Give examples

Q.

Are Darwins finches an example of adaptive radiation?

Q.

What is parallel evolution?

Q.

What are the four factors of Natural selection?

Q.

Write about the struggle for existence on which Darwinism is based.

Q.

What Is the Main Cause of Evolution?

Q.

According to Hugo de Vries, mutations are

1. Random and directionless

2. Random and directional

3. Definite and directional

4. Small and directionless

Q.

Why is natural selection important?

Q.

What are four theories of evolution?

Q. Please give simple definition of geographical isolation, genetic drift and natural selection.

Q.

Which among the following does not act as a driving force of evolution?

1. Speciation

2. Mutation

3. Genetic drift

4. 
   Natural selection

Q.

Which one of the following aspects was found in Darwin’s finches?

1. Biogeography

2. Industrial melanism

3. Biochemical evidence

4. Embryological evidence

Q.

How is bacteria an example of natural selection?

Q. Natural selection means:

1. Better adaptability

2. Elimination of less adapted

3. Better survival

4. \N

Q. What is natural selection? Explain.

Q.

Which scenario is an example of Natural selection?

Q.

Do viruses have heredity?

Q.

What is speciation?

Q.

___ is also known as the theory of Organic Evolution.

Q. According to Darwin, evolution is termed as:

1. a sudden but discontinuous process
2. a slow and continuous process
3. a slow and discontinuous process
4. a slow, sudden and discontinuous process

Q. Which one provides the correct sequence of events in origin of species according to Darwinism?
(1) Natural selection

1. 1, 2, 3, 4
2. 2, 4, 3, 1
3. 4, 2, 3, 1
4. 2, 3, 1, 4

Q. ___ is also known as the 'Theory of Organic Evolution'.

1. Theory of Natural Selection
2. Theory of Special Creation
3. Theory of Panspermia
4. The Big Bang Theory

Q. Which of the following periods is largely associated with the extinction of dinosaurs and the increase in flowering plants?

1. Jurassic
2. Triassic
3. Cretaceous
4. Permian

Q. In his theory of natural selection, Charles Darwin suggested "survival of fittest" as basis of organic evolution. The correct explanation for "survival of fittest" is

1. The strongest members of a population are those who breed and leave offspring.
2. The members of a population that are strongest, survive the longest.
3. The members of a population that are best suited for their environment breed and have offspring.
4. The weakest members of a population do not reproduce so their traits are not passed on.
5. The members of a population that are least suited die off immediately.

Q.

According to Darwin, evolution is:

1. A slow and continuous process

2. A slow, sudden and discontinuous process

3. A sudden but discontinuous process

4. A slow and discontinuous process

Q. Define 'evolution'. Describe Darwin's theory of evolution.

Q. The theory of natural selection of Darwin to explain organic evolution was based on

1. Probability of reproduction, struggle for existence and survival of the fittest
2. Inheritance of acquired characters
3. Modification in organs through use and disuse
4. Appearance of sudden large variations, then inheritance and survival of those not having these variations

Q. How Genetic drift affects evolution?

Q. Natural Selection theory of Darwin states that

1. Environment does not play any role in evolution.
2. Heritable variations arise through changes in gene complex of a species.
3. Natural selection acts on favourable variations of a species.
4. Characters acquired during the life of an individual are inherited by its offspring.

Q.

Did humans and dinosaurs coexist?