Tag: darwinism or theories of natural selection

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Questions Related to darwinism or theories of natural selection

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

Which of the following is not related to the Darwin's theory of Evolution

  1. All living organisms of a group are not identical.

  2. Variations may be passed from parent to off-spring

  3. Evolution is a slow and continuous process.

  4. Population do not grow in geometrical progression
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In 1859, Charles Darwin in his book 'Origin of species' stated the 'theory of evolution'. in this theory he has stated that no two individuals are the same but they have variations which help them in survival. This is called a natural selection. According to his theory, evolution is a slow and continuous process as it creates variation among individuals, these variations may or may not be passed among the offsprings. He had not explained the population growth and the phylogeny of an individual.

So, the correct option is 'Population do not grow in geometrical progression'. 

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

In Galapagos islands, Drawin observed variation in structure in

  1. Elephants

  2. Giraffies

  3. Rats

  4. Finch birds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Darwin developed a theory of biological evolution in which by observing a different type of finches in the Galapagos islands. He observed 15 species of passerine birds and they varied island to island. This observation helped him to give a theory on natural selection and that lead to evolution to Finch species. 

So the correct answer is ' Finch birds ' 

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

In Galapagos islands, Darwin observed variations in structures in

  1. Elephants

  2. Giraffies

  3. Rats

  4. Finch birds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
In the Galapagos Islands, Darwin observed that there were many varieties of small black birds, later called finches were present. All those varieties evolved on the island itself ranging from being seed-eating nature to become insectivorous, fruit eaters etc 
So, the correct option is 'Finch birds'
Multiple choice biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

Darwin was most influenced by research work of 

  1. Wallace

  2. Spencer

  3. Malthus

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

Charles Darwin was influenced by Thomas Robert Malthus, a late-eighteenth century economist. Malthus wrote "Essay on the Principle of Population" (1798), which Darwin read and was inspired by. The central theme of Malthus' work was that population growth would always overpower food supply growth, creating perpetual states of hunger, disease and struggle. The natural, ever-present struggle for survival caught the attention of Darwin and he extended Malthus' principle to the evolutionary scheme. 

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

On the voyage of the Beagle, Darwin (1809 - 1882) found that flora and fauna of temperate South America are most similar to that of 

  1. Tropical South America

  2. Australia

  3. Asia

  4. Europe
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Charles Darwin went on a trip aboard HMS beagle as a naturalist. The purpose of this voyage was to map the uncharted areas of south Americal coastline. Darwin observed unique species of plants and animals in South America like finches and iguana. He noticed that the temperate South American animals closely resembled the tropical South Americal animals as compared to temperate European animals. Some of the characteristics of fossils observed by him in South America were similar with the contemporary South American characters of organisms.

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

The book 'Descent of Man and Selection in Relation to Sex' was written by

  1. Charles Darwin

  2. J B. Lamarck and C. Darwin

  3. F.B. Sumner and E. Darwin

  4. Robert Brown
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Descent of Man and Selection in Relation to Sex is a book by English naturalist Charles Darwin, first published in 1871, which applies evolutionary theory to human evolution, and details his theory of sexual selection, a form of biological adaptation distinct from, yet interconnected with, natural selection. The book discusses many related issues, including evolutionary psychology, evolutionary ethics, differences between human races, differences between sexes, the dominant role of women in mate choice, and the relevance of the evolutionary theory to society. Thus, option A is correct.

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

The main features of Darwin's theory of evolution are 

  1. Struggle for existence

  2. Natural selection

  3. Survival of the fittest

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Darwin proposed the theory of natural selection to explain the process of evolution. According to Darwin’s theory of natural selection, all organisms have the potential to reproduce limitlessly irrespective of the fact that each species maintain a constant density over time. However, the struggle for existence, i.e. the competition among individuals for available resources to survive and reproduce, put a check on species density and maintains it at a constant level. Survival of fittest is unequal ability of individuals to survive and reproduce based on suitability of their inherited characters to prevailing environmental conditions. It imparts the reproductive advantage to certain organisms which account for major part of the gene pool of the species. Thus, natural selection favors the individual with survival and/or reproductive advantage over others under existing environmental condition. Thus, the correct answer is option D.