Tag: evolution of life

Quizzes (2) Questions (158)

Questions Related to evolution of life

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

As per Lamarck, well developed auricle muscles of rabbit have evolved due to

  1. Continuous use

  2. Internal vital force

  3. New need

  4. All the above
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 'Continuous use'

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

The scientist who first stressed on adaptation as a means of evolutionary modification was 

  1. Huxley

  2. Weismann

  3. Charles Lyell

  4. Lamarck
Reveal answer Fill a bubble to check yourself
D Correct answer
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'

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

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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lamarck in his use and disuse theory proposed that any body part used vigorously caused it to become stronger and inherited in descendants. Lamarckism was failed to explain the reason behind weak muscles of wrestler’s son. Which was later on explained by August Weismann in his germ plasm theory. The germplasm theory claimed that only those changes would be inherited that affects germplasm (now called DNA) and any change in the body would not affect germplasm, so could not be inherited. Thus, the correct answer is ‘Weak muscles in the son of a wrestler.’

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

Choose the correct answers from the alternatives given.
Lamarck believed that certain parts of the body became more complex through the generations because they

  1. are most similar to Gods perfection

  2. contribute to greater reproductive success

  3. are predetermined to do so

  4. are used more extensively than other parts
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lamarck believed that evolution occurs when an organism uses a body part in such a way that it is altered during its lifetime and this change is then inherited by its offspring. For example, Lamarck thought that giraffes evolved their long neck s by each generation stretching further to get leaves. This theory was called the Use and Disuse of Organs.

Hence, the correct answer is 'are used more extensively that other parts'

Multiple choice biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

The theory of natural selection was given by

  1. Lamarck

  2. Alfred Wallace

  3. Charles Darwin

  4. Oparin and Haldane
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The characteristics that enable enable some organism to survive better than others in the same environment, are said to be selected by nature. Darwin use the phrase 'Natural selection' for this.
So, the correct option is 'Charles Darwin'
Multiple choice biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?

  1. Overproduction, variations, constancy of population size, natural selection

  2. Variations, constancy of population size, over-production, natural selection

  3. Overproduction, constancy of population size, variations, natural selection

  4. Variations, natural selection, overproduction, constancy of population size
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Organisms tend to increase the number of offsprings in the individual for survival in number. Then the interspecific, intraspecific, extra specific struggle for existence occurs. Then small changes occur from the parent generation to the next progenies which acts as a raw material for a source of evolution. And nature selects the useful or adaptive variation.

So, the correct answer is 'Overproduction, the constancy of population size, variations, natural selection'.

Multiple choice biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

Fitness according to Darwin refers to______________.

  1. Number of species in a community

  2. Useful variation in population

  3. Strength of an individual

  4. Reproductive fitness of an organism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
According to Darwin's theory fitness refers to the Reproductive fitness of an organism because it describes the reproductive success of an individual which is measured as the number of offsprings produce by an individual with respect to specific genotype or phenotype. Fitness theory of Darwin doesn't depend on strength of an organism to survive but the ability of an organism to pass on its genetic material to its offsprings. 
So, the correct answer is 'Reproductive fitness of an organism'.
Multiple choice biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

Darwinism explains all the following except.

  1. Offspring with better traits that overcome competition are best suited for the environment

  2. Variations may or may not be inherited from parents to offspring through genes

  3. Within each species, there are variations

  4. Organisms tend to produce more number of offspring than can survive
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The main drawback of Darwinism is lack of knowledge of heredity. Darwin's theory could not explain the inheritance of variations from parents to offsprings through genes.

So, the correct answer is 'Variations may or may not be inherited from parents to offspring through genes'.