Tag: darwinism or theories of natural selection

Questions Related to darwinism or theories of natural selection

Darwin's theory of pangenesis proposes __________.

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

  1. Some physical basis of inheritance.

  2. Development of useful organs and degeneration of useful organs.

  3. Increase in organ size with age

  4. Development of organs due to will power.

Show answer
Correct Option: A
Explanation:

In 1868, Darwin put forward the Theory of Pangenesis. According to this theory, every organ of the body produces minute hereditary particles, called gemmules or Pangenes, and they can be carried through the blood into the gametes. It laid emphasis on some basis of inheritance. Hence, Option A is correct. 

Darwin in his 'Natural Selection Theory' did not belive in any role of which one of the following ?

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

  1. Parasites and predators as natural enemies.

  2. Survival of the fittest

  3. Struggle for existence

  4. Discontinuous variations

Show answer
Correct Option: D
Explanation:

The main features of Darwin's theory of Natural Selection are as follows - 

  1. Over production
  2. Struggle for existence
  3. Survival of the fittest
  4. Origin of new species
  5. Variations and hereditary
According to Darwin, the variations were continuous. Therefore, Option D is correct option.   

According to Darwin, which one is not of much importance in formation of species?

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

  1. Over-production

  2. Survival of the fittest

  3. Struggle for existence and variations

  4. Inheritance of acquired characters

Show answer
Correct Option: D

Darwinism explains all except :

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

  1. Within each species there are variations.

  2. Variations are inherited from parents to offspring through genes.

  3. Organisms tend to produce more offspring than can survive.

  4. Organisms with better traits that overcome competition are best suited under the environment.

Show answer
Correct Option: B
Explanation:

One of the major drawbacks of Darwin's theory is the absence of knowledge on inheritance. The genetic basis of evolution, cause of variations was not included in Darwin's 'Origin of Species'. It was only after the discovery of genes and traits by Mendel, genetics could be associated with evolution.

So, the correct answer is 'Variations are inherited from parents to offspring through genes'

Original features of Darwin's finches in Galapagos islands were adapted for :

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

  1. Flesh eating

  2. Insect eating

  3. Fish eating

  4. Honey collecting

  5. Seed eating

Show answer
Correct Option: E
Explanation:

The small black birds found on Galapagos islands, which later came to be known as Darwin's finches were originally adapted with seed-eating features. From these many other forms evolved with altered beaks depending on the food habit. This enabled them to become insectivorous and vegetarian finches.

So, the correct answer is 'Seed eating'

The naturalist Charles Darwin was inspired to write "Origin of Species" when the ship in which he was travelling reached :

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

  1. Hawaii islands

  2. Galapagos islands

  3. Antartica

  4. Great Barrier Reef

Show answer
Correct Option: B
Explanation:

  • Darwin reached the Galapagos islands on HMS Beage while travelling which is of historic importance.
  • During his visit to the islands, Darwin noted that the unique creatures were similar from island to island, but perfectly adapted to their environments which led him to ponder the origin of the islands' inhabitants.
  • So, Darwin's visit to the Galapagos Islands had a resounding impact on the formation of his Theory of Natural Selection.
Hence, the correct option is 'Galapagos islands'.

Darwin's finches provide an excellent evidence in favour of evolution. This evidence comes from the field of ____________.

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

  1. Anatomy

  2. Biogeography

  3. Embryology

  4. Palaeontology

Show answer
Correct Option: A

The 'Origin of Species' is written by

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

  1. Linnaeus

  2. Darwin

  3. Hackel

  4. Whittaker

Show answer
Correct Option: B
Explanation:
  • 'On the Origin of Species', published on 24th November 1859, is a work of scientific literature by Charles Darwin which is considered to be the foundation of evolutionary biology.
  •  Its full title was 'On the Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life'.
  • Darwin's book introduced the scientific theory that natural selection and presented a body of evidence gathered from the Beagle expedition, stating that the diversity of life descended from a common ancestor through evolution. 

Choose the correct answers from the alternatives given.
Which of the following is not an important element of Darwin's theory of evolution?

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

  1. Inheritance of acquired traits

  2. All organisms arose from a common ancestor

  3. Presence of variation within a population of individuals

  4. Natural selection

Show answer
Correct Option: A
Explanation:

Darwin's Theory of Evolution states that groups of organisms will undergo genetic changes over time due to the process of natural selection. If enough changes occur, this can create new species from the pre-existing ones. Variations in a species' genetics that lead to evolution often come from mutations.

So correct answer is A, Inheritance of acquired traits.

Darwin's explanation of the way in which evolution occurs is that

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

  1. God determines which species should evolve

  2. progressive adaptations enable one species to leave more offspring

  3. certain species have built-in plans of evolution

  4. those traits used most often persist longer

Show answer
Correct Option: B
Explanation:

According to Darwin the evolution occurs due to adaptation of the species to the environmental conditions , these adaptations are then carried out to the next generation by reproduction thus the species survive and evolve 

So, the correct answer is 'progressive adaptations enable one species to leave more offspring'