Lamarckism

Q.

The theory of use and disuse was proposed by

1. Stebbins

2. Aristotle

3. Darwin

4. Lamarck

Q.

What is the theory of acquired character?

Q. Structure like eye evolved due to single change in DNA. Justify the statement

Q.

Write short note on Lamarckism

Q. The theory of continuity of germplasm was proposed by:

1. De Vries
2. Weismann
3. Darwin
4. Lamarck

Q. Lamarck's theory of evolution is commonly known as

1. Continuity of germplasm
2. Inheritance of acquired characteristics
3. Natural selection
4. Descent with change

Q.

The physical expression of a gene is called ___

Q.

Explain the occurrence of vestigial organs on the basis of Lamarck's theory of use and disuse.

Q.

The first scientist who proposed his theory for the evolution was

(a) Darwin

(b) Mendel

(c) Lamarck

(d) Wallace

Q.

Weismann cut off the tails of mice generation after generation, but tails neither disappeared nor shortened, proving that _______.

1. tail is an essential organ.

2. mutation theory was wrong

3. Lamarckism was wrong

4. Darwin was correct

Q. Which among the following organs is vestigial in birds?

1. Wings

2. Wisdom teeth

3. Tail bone

4. Pinna

Q. All the following are acquired traits in humans except ______.

1. learning a foreign language
2. blue eye colour
3. the ability to play instruments
4. learning to ride a bike

Q. Lamarck proposed the theory of acquired inheritance.

1. True

2. False

Q.

How does Lamarckism explain the evolution of long-necked and long-legged giraffe?

Q.

Briefly discuss Lamarckian Theory of Inheritance, citing an appropriate example.

Q.

Statement 1 : Lamarck believes in use and disuse of organs.

Statement 2: Characters present in the offspring are independent of those in their parents.

1. Statement 1 is true and statement 2 is false

2. Statement 1 is false and statement 2 is true

3. Both the statements are false

4. Both the statements are true

Q.

Assertion: Acquired characters are not inheritable.

Reason: Acquired characters generally affect the somatic cells and it is the germ cells that are passed on to the next generation.

Read the assertion and reason statements carefully and answer the question on the basis of the following options.

1. Assertion is True, Reason is True; Reason is a correct explanation for Assertion.

2. Assertion is True, Reason is True; Reason is not a correct explanation for Assertion.

3. Assertion is True, Reason is False.

4. Assertion is False, Reason is True.

Q.

___ is a vestigial organ in human beings that is still functional in the herbivorous mammals.

Q.

The three principles of Mendelism are_______.

1. Dominance-recessive, segregation and independent assortment

2. Dominance-recessive, segregation and linkage

3. Linkage, segregation and independent assortment

4. Linkage, Dominance-recessive and independent assortment

Q. Wings of birds like ostrich have become weak due to disuse.
___ used this example to explain his theory on evolution.

Q.

Give two examples in support of Lamarckism.

Q.

Mention the two principles through which Lamarck explained his ideas.

Q. put forth the 'Theory of Germplasm'.

1. James Watson
2. August Weismann
3. Lamarck
4. Charles Darwin

Q. The theory of use and disuse was proposed by

1. Darwin
2. Stebbins
3. Lamarck
4. Aristotle

Q.

Inheritance of acquired characters was proposed by

1. Darwin

2. Weisman

3. Lamarck

4. De Vries

Q. Ancestors of giraffe were considered to be the size of a deer. They grew their neck and limbs due to overuse of these parts. Which theory proposes this idea?

1. Theory of chemical evolution
2. Lamarck's theory of use and disuse of organs
3. Theory of natural selection
4. Mutation theory

Q. Weismann cut off the tails of mice generation after generation, but tails neither disappeared nor shortened, proving that

1. Darwin was correct
2. Lamarckism was wrong about inheritance of acquired characteristics
3. Tail is an essential organ
4. Mutation theory was wrong

Q.

Write about the observed facts and deduction of Darwinism.

Q.

Lamarck gave the example of which animal to explain his theory of inheritance of acquired characters?

1. Giraffe

2. Crocodile

3. Tiger

4. Rhino

Q.

Acquired traits are traits gained by an individual as a result of his interaction with the environment. These traits do not change the genetic make-up of an organism and hence are not carried down by heredity. Any random error in gene, that occurs while replication is known as________________________.