Darwinism

Q. The greatest drawback of Darwin’s theory was his failure to explain ___.

1. variations
2. survival of the fittest
3. over production
4. struggle for existence

Q.

For evolution, the most important requirement is

1. Variations

2. Adaptation

3. Natural selection

4. Developmental anatomy

Q.

Assertion (A): Without variations, evolution is impossible.
Reason (R): Only useful variations are transmitted to the next generation.

1. Both A and R are true and R is the correct explanation of A

2. Both A and R are true but R is not the correct explanation of A

3. A is true but R is false

4. A is false but R is true

Q. Which among the following sequences was proposed by Darwin for organic evolution?

1. Overproduction $\to$ Struggle for existence $\to$ Variation $\to$ Survival of the fittest
2. Overproduction $\to$ Variation $\to$ Struggle for existence $\to$ Survival of the fittest
3. Survival of the fittest $\to$ Overproduction $\to$ Variation
4. Variation $\to$ Overproduction $\to$ Survival of the fittest

Q.

Biology is derived as

Q. Victor Hugo de Vries postulated the theory of mutation.

1. True
2. False

Q. In which year was the theory of natural selection proposed?

1. 1860
2. 1873
3. 1858
4. 1854

Q.

Explain evolution by natural selection?

Q. The modern theory on organic evolution is the synthesis of ideas from:

1. Theory of natural selection
2. Mutation theory
3. Mendel’s principles of heredity
4. None of these

Q. Variation is the phenomenon in which nature selects organisms having traits favourable to the environment.

1. True
2. False

Q. Variations caused by sudden genetic changes are called mutations.

1. True
2. False

Q.

Natural selection operates when nature selects for _____ .

Q. Who stated the phrase 'Survival of the fittest'?

1. Lamarck
2. Weismann
3. Darwin
4. Haldane

Q.

Mutation theory fails to explain the significant impact of mutation on evolution.

1. True

2. False

Q. 'Survival of Fittest' is the unique feature of theory by______

1. Charles Darwin
2. Alfred Russel Wallace
3. August Weismann
4. Jean Baptiste Lamarck

Q. Darwinism is based on which of the following principles?

1. Natural selection
2. Inheritance of acquired characteristics
3. Survival of the fittest
4. Struggle for existence

Q.

How does the study of genetics explain the process of natural selection?

Q.

Define the terms- (v) evolution.

Q. 'Only those organisms which have developed advantageous variations have a better chance of survival'. This idea of Darwin's came to be known as:

1. Survival of the fittest
2. Natural selection
3. Struggle for existence
4. Variation

Q.

Only organisms that can withstand competition are able to survive and reproduce in each generation.

1. True

2. False

Q. In which of the following swarming is found?

1. In mosquitoes
2. In house flies
3. In locust
4. In Pyrilla

Q. Which of the following are examples of natural selection?

1. Industrial melanism
2. Antibiotic resistance in bacteria
3. Evolution of wolves to dogs
4. Darwin’s finches

Q. Theory of natural selection is also known Neodarwinism.

1. False
2. True

Q. Mutation could lead to evolution and speciation.

1. True
2. False

Q. The idea of ‘survival of the fittest’ was developed by

1. Pasteur
2. Weismann
3. Darwin
4. Lamarck

Q. Read the statements given below and choose the right one about Darwin.

1. He conducted experiments to prove the theory of chemical evolution.
2. He believed that Lamarck's theory of evolution was correct.
3. He said that evolution was due to acquired characters.
4. He stated that variations are the raw materials for evolution.

Q. What did Charles Darwin publish in 1859?

1. Origin of Species by natural selection
2. Species Plantarum
3. Philosophie Zoologique
4. De Naturien Familien

Q. Galapagos tortoises are most similar to

1. Fossilised tortoise species of Australia
2. Fossilised turtle species of Africa
3. Living species tortoise of South America
4. Living species tortoise of North America

Q. Theory of pangenesis was given by

1. Kerens
2. Mendel
3. De Vries
4. Darwin

Q. Evolution is a gradual change that develops a species into a

1. Complex Form
2. All the above
3. Better form
4. Different form