Tag: zoology

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Questions Related to zoology

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

The use and disuse principle of evolution or theory of 'Inheritance of Acquired Characters' was proposed by

  1. Hugo de Vires

  2. Lamarck

  3. Weismann

  4. Darwin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The theory of inheritance of acquired characters was proposed by Jean Baptiste de Lamarck, French biologist in 1801. He states that organism gets adapted to the changes of environment, which it meets in lifetime and passes it on to progenies and thus becomes heredity. Thus, the correct answer is 'Lamarck.'

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

According to Lamarck, evolution is towards

  1. Increase in size

  2. Decrease in size

  3. Both A and B

  4. Decrease in complexity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lamarckism is the theory of acquired characters, it includes :

  • Internal vital forces.
  • Effects of environment and new needs.
  • Use and disuse of organs.
  • Inheritance of acquired characters.

So, the correct option is 'Increase in size'.

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

Lamarck's theory of evolution is known as 

  1. Natural selection

  2. Inheritance of acquired characters

  3. Survival of fittest

  4. Mutation theory
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lamarck is best known for his Theory of Inheritance of Acquired Characteristics, first exhibited in 1801 (Darwin's first book - distributed in 1859): If a life form changes amid life so as to adjust to its condition, those progressions are passed on to its posterity.

So, the correct option is 'Inheritance of acquired characters'.

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

The first attempt to solve the problem of organic evolution was done by 

  1. Mendel

  2. Haeckel

  3. Lamarck

  4. Darwin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In early 19$^{th}$ century, Jean Baptiste de Lamarck, French zoologist suggested the first theory of organic evolution based on the development of new or modified character in response to environmental changes. For instance, giraffe acquired long neck due to stretching of the neck for food. Thus, the correct answer is ‘Lamarck.’

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

According Lamarckism long necked Giraffes evolved because :

  1. Nature selected only long necked animals.

  2. Of stretching of necks by short one never many generations.

  3. Humans preferred long necked animals

  4. Mutation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The ancestors of giraffe had short neck and shorter fore limbs. Due to change in the environmental condition they were forced to feed on taller trees. In order to reach to the food they had to stretch their neck and lift their fore limbs from the ground. This effort they made through out the life ,due to which their forelimbs and neck became slightly longer.

So, the correct answer is 'Of stretching of necks by short one never many generations'

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

Which one does not favour Lamarckian concept of inheritance of acquired characters?

  1. Lack of pigment in cave dwellers

  2. Absence of limbs in snakes

  3. Presence of webbed toes in aquatic birds

  4. Melanisation of peppered moth in industrial areas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Melanisation of peppered moth in industrial areas is an effect of natural selection, where due to change in environmental conditions, of the two moth forms that existed - the grey and black, the black was favored by natural selection over the grey, as the grey were easily spotted by its predator.
So, the correct answer is 'Melanisation of peppered moth in industrial areas'
Multiple choice zoology evolution of life darwin's theory of evolution process of evolution lamarckism

Which cannot be explained by Lamarckism?

  1. Loss of tail by humans

  2. Elongation of neck in Giraffe

  3. Weak progeny of a Nobel laureate

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lamarckism suggests that acquired traits are inherited. A Nobel laureate's intelligence or strength is not an acquired physical trait that would be passed down to offspring in the way Lamarck described, making this a common counter-example.

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

Theory of use and disuse was propounded by :

  1. Wallace

  2. Lamarck

  3. Darwin

  4. De Vries
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Jean Baptiste Lamark proposed the theory of use and disuse of organs.

The organs which are in constant use become better developed while the organs which are not used for long get reduced in size and become vestigial.
So, the correct answer is 'Lamarck'

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

Which is not a concept of Lamarckism ?

  1. Rate and survival of organisms are different due to variations

  2. Environmental pressure produces variations

  3. An organ in constant use will grow in size

  4. Inheritance of acquired characters
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lamarckism focuses on use/disuse and inheritance of acquired characters. The idea that survival is based on variations is a core concept of Darwinism (natural selection), not Lamarckism.