Lamarckism

Q. The theory of use and disuse of organs was proposed by

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

Q.

Mention four features of a birds body that help it to fly.

Q. 'Use and disuse of organs' is one of the feature of the theory proposed by______

1. Lamarck
2. Darwin
3. None of these
4. Hugo de Vries

Q. Lamarck suggested that ancestors of snakes had 4 well developed limbs.

1. True
2. False

Q. Which of the following is not a postulate of Darwinism?

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

Q. According to Neo - lamarckism

1. Acquired characters influence germline cells
2. All of the above
3. Acquired characters influence success of reproduction
4. Acquired characters influence somatic cells

Q. Assertion (A): According to Lamarck, the environment is under frequent changes which create new needs in an organism.
Reason (R): These needs force the organism to use some organs more frequently and some organs less frequently (use and disuse of organs).

1. Both A and R are true and R is the correct explanation of A
2. A is true but R is false
3. A is false but R is true
4. Both A and R are true but R is not the correct explanation of A

Q. What is another name for Lamarck's theory of evolution?

1. Theory of survival of the fittest
2. Theory of mutation
3. Theory of inheritance of acquired characters
4. Theory of struggle for existence

Q.

How is the skeleton of bird well suited for flying?

Q. In which year was the theory of inheritance of acquired characters proposed?

1. 1807
2. 1808
3. 1809
4. 1907

Q.

Question 28
It is believed that height of a child depends upon the genes inherited from parents. However, it is often seen that tall parents may have short children and vice-versa. Are there factors other than genes, that can cause these variations?

Q.

What is being shown in the following diagram?

Q.

Define artificial selection.

Q. Assertion (A): Weismann found that breeding mice whose tails were cut off, results in tail-less offspring.
Reason (R): Lamarckism states that characters acquired by an organism in its lifetime is passed on to its offsprings.

1. Both A and R are true and R is the correct explanation of A
2. A is true but R is false
3. A is false but R is true
4. Both A and R are true but R is not the correct explanation of A

Q. Eugenics is the branch concerned with

1. Improving the quality of human race by symptomatic treatment of genetic diseases
2. Improving the quality of human populations by the application of genetic principles
3. Improving the quality of human race by providing best suitable environment
4. None of the above

Q.

Short Answer Type Questions:

Name three advantages of bipedal mode of locomotion.

Q. Swathy conducted an experiment in which she made 72 generations of flies blind. She found that the 73rd generation had normal eyes. Which theory does this disapprove?

1. Theory of natural selection
2. Theory of mutation
3. Theory of acquired characters
4. Theory of chemical evolution

Q. Which theory does the above image support?

1. Theory of natural selection
2. Theory of mutation
3. Theory of inheritance of acquired characteristics
4. Theory of abiogenesis

Q. Dinosaurs came into existence _____ million years ago.

1. 131
2. 161
3. 231
4. 201

Q. Pigeon is a .......... bird.

1. Both A and B
2. None of these
3. Warm blooded
4. Cold blooded

Q. Lamarckism cannot explain

1. webbed toes in aquatic birds
2. Weak muscles in the son of a wrestler
3. Long narrow and limbless body of snakes
4. heterophylly

Q. The theory which proposes that microevolution leads to macroevolution is known as________

1. Neo - Lamarckism
2. Neo - Mendelism
3. Modern Evolutionary Synthesis
4. Neo - Darwinism

Q. Neha had a discussion on evolution in class. She heard that there is a prediction that human beings will eventually lose their pinky finger (little finger). If this is true, which of the following theories could it be based on?

1. Natural selection
2. Use and disuse of organs
3. Survival of the fittest
4. Natural variation

Q. Theory of continuity of germplasm negated ___

Q. When an organ is used, it will develop and if it is not used, it weakens to become vestigial. Who said this?

1. Darwin
2. Hugo de Vries
3. Lamarck
4. Mendel

Q. The main dictate(s) of Lamarck's theory is/are

1. Effects of environment
2. Effects of Use and Disuse of organs
3. Inheritance of Acquired Characteristics
4. All of the above