Tag: darwin's theory of evolution

Questions Related to darwin's theory of evolution

The theory that environment can bring about changes in individuals was proposed by :

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Mendel

  2. Darwin

  3. Lamarck

  4. Lyell

Show answer
Correct Option: C
Explanation:

The first theory of evolution was proposed by Jean Baptiste de Lamarck. Lamarckism proposed:

  • Some internal forces are present in all organisms. By the presence of these forces, the organism has the tendency to increase the size of their organs or the entire body.
  • Environment influences all type of organisms. Changing environment give rise to new needs. New needs or desires produce new structure and change habits of the organism.
  • If an organ is constantly used, it would be better developed whereas disuse of organ results in its degeneration.

So, the correct option is 'Lamarck'.

Which of the following is not a concept of Lamarckism or theory of inheritance of acquired characters?

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Effect of environment and new needs

  2. Survival of the fittest

  3. Internal vital force

  4. Inheritance of acquired character

Show answer
Correct Option: B
Explanation:

Survival of the fittest was the phrase given to describe natural selection and it was explained and developed by Charles Darwin. The phrase was given by Herbert Spencer.

What was the basic principle of Lamarckism?

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Inheritance of acquired characters

  2. Natural selection

  3. Survival of the fittest

  4. Variations

Show answer
Correct Option: A
Explanation:
The 'theory of use and disuse' of Lamarck, advocated the idea that animals acquired characteristics after using certain physical traits constantly. For example, he believed that the reason why necks of giraffes were long, was because they stretched to reach leaves on high trees
So, the correct answer is 'Inheritance of acquired characters'

Penguin is a bird who lost the use of its wings by not flying. Whose  statement is this?

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Darwin

  2. Wallace

  3. Lamarck

  4. Huxley

Show answer
Correct Option: C
Explanation:

The theory of use and disuse of Lamarck, advocated the idea that animals acquire characteristics after using certain physical traits constantly. This was later disproved.

Which of the following evidences do not famous the Lamarckian concept of inheritance of acquired characters?

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Lack of pigment in cave dwelling animals

  2. Melanisation in peppered moth

  3. Absence of limbs in snakes

  4. Elongation of giraffes neck

Show answer
Correct Option: B
Explanation:
  • Lamarckism was the theory given by the monk who was one of the brilliant scientists use the first natural ways to put forward a general theory of evolution according to his theory there is some internal force of life that tend to increase the size of organism and according to his loss, the necessity in animals causes them to produce structures.
  •  Lamarck's most famous law was the effect of use and disuse of organs that according to long neck of Giraffe was the result of continuous stretching of the neck to obtain food and as snakes did not use their Limbs so they became rudimentary and moth to develop melanin to get protected so the correct option is lake of pigment in cave-dwelling animals.

Where does inheritance of acquired characters come from?

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Lamarckism

  2. Darwinism

  3. Neo-Darwinism

  4. Neo-Lamarckism

Show answer
Correct Option: A
Explanation:

According to Lamarckism, according to use and disuse theory, animals will acquire characteristics after using certain physical traits constantly.

Which of the following is not a concept of Lamarck?

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Environmental pressure cause variation.

  2. Rate and survival of organism is different due to variation.

  3. Inheritance of acquired character.

  4. If an organ is used constantly, it will continuously increase its size.

Show answer
Correct Option: B
Explanation:

Lamarckism never explains about variation in due course of time and survival of organism. It explains about the characteristics acquired by animals as a result of continuous use of the physical trait.

Which of the following evidences does not favour the Lamarckian concept?

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Absence of limbs in snakes.

  2. Presence of webbed toes in aquatic birds.

  3. Melanization in peppered moth in industrial area.

  4. Lack of pigment in cave dwelling animals.

Show answer
Correct Option: C
Explanation:

Industrial melanism in the peppered moth (Biston betularia) is an iconic case study of ecological genetics, but the molecular identity of the gene determining the difference between the typical and melanic (carbonaria) moths is entirely unknown. It is never in accordance with Lamarckism (use and disuse theory).

A scientist kept 69 generations of Drosophila in darkness even after that the flies had normal eyes, which law is  disproved in this case? 

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Synthetic theory

  2. Natural selection

  3. Germplasm theory

  4. Acquired characters are inherited

Show answer
Correct Option: D
Explanation:

Lamarckism or theory of use and disuse has been disproved in this case. It states that animals acquired characteristics after using certain physical traits constantly.

Name the scientist who cut off the tails of mice of successive generations to prove Lamarck's theory wrong, was

zoology evolution of life darwin's theory of evolution process of evolution lamarckism

  1. Weismann

  2. Haeckel

  3. Darwin

  4. Wallace

Show answer
Correct Option: A