Tag: universe and organic evolution

Questions Related to universe and organic evolution

Neo-Darwinism believes that new species develop through

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. Continuous variations and natural selection

  2. Mutation with natural selection

  3. Hybridization

  4. Mutation

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Correct Option: B
Explanation:

Neo-Darwinism is a modification of the original theory of Darwin to remove its shortcomings. Instead of continous variations, mutations are believed to help form new species. Variations accumulate in the gene pool and not in the individuals. 

Darwin judged the fitness of an individual by

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. Ability to defend itself

  2. Strategy to obtain food

  3. Number of offsprings

  4. Dominance over other individuals

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Correct Option: C

Which of the following can be said as the "Theory of Darwin"

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. Survival of the fittest and struggle for existence

  2. Weak and strong always maintain a fixed proportion

  3. Different species do not arise by genetic mutation

  4. None of these

Show answer
Correct Option: A
Explanation:
Darwin believed that life thrives and multiplies by the principle of natural selection.
The theory of natural selection had the following postulates: 

1) Increased reproduction- He said that each and every organism or species tend to reproduce to the maximum to let its species live and multiply. 
2) The arithmetic growth of food and availability of space.
3) Survival of the fittest- Darwin’s theory of natural selection thus believes that those who can survive till the end are the ones that nature selects.
4) Variations- Due to this struggle for food and space, each organism or species tend to get an advantage over the other.
5) Struggle for existence - with a rapidly multiplying population, there is an increased demand for both space and food. The organism or species that is able to fight its own species or the other species or the environment itself lives. 

So option A is the correct answer and B and  C are not related to the Theory of darwin.

Why, according to our reading, did Darwin take so long to publish the Origin of Species?

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. Darwin wanted to share his theory as quickly as possible once he returned from his voyage on the Beagle.

  2. It took twenty years for Darwin to develop a theory.

  3. Darwin suffered from a number of illnesses.

  4. Darwin was concerned about the reaction of others to the implications of his theory.

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Correct Option: D

"Ontogeny repeats phylogeny" was coined by _____________.

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. Darwin

  2. Lamarck

  3. Morgan

  4. Haeckel

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Correct Option: A

In Galapogos island, Darwin found different varieties of Finches, originated from a common ancestor. The original variety of the Finches ws ____________.

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. Insectivorous

  2. Vegetarian

  3. Seed eating

  4. Cactus eating

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Correct Option: A

Read the following statements:

(i) Coelacanths can be considered as ancestors of modern day frogs and salamanders.

(ii) Darwin's finches are examples of adaptive radiation.

(iii) Adaptive radiation refers to evolution of different species from a common ancestor.

(iv) Flippers of penguins and dolphins are examples of divergent evolution.

How many of the above statements are wrong?

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. Two

  2. One

  3. Three

  4. Four

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Correct Option: B

Choose the correct answers from the alternatives given.
Many bacteria are now resistant to penicillin, because

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. previously resistant forms survived and reproduced better than non-resistant forms

  2. penicillin triggers the synthesis of resistant proteins

  3. penicillin causes gene mutations, some of which are beneficial

  4. environment inhibits competition among bacteria

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Correct Option: A
Explanation:

Due to variation in bacteria some of them have resistance from penicillin. Penicillin largely use as killing bacteria but now bacteria develop immunity to penicillin. So bacteria with resistant gene from penicillin transferred character to offspring. 

Hence, the correct answer is 'previously resistant forms survived and reproduced better than non-resistant forms'

Darwin's theory of natural selection is objected, because it (A) (B) (C) (D) Ans:112 B

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. stresses upon slow and small variations

  2. explains the adaption of certain inherited characters

  3. stresses on interspecific competition

  4. explains that natural calamities take a heavy annual toll of lives

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Correct Option: B

DDT is 

zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

  1. a non-degradable pollutant

  2. a biodegradable pollutant

  3. an antibiotic

  4. not a pollutant.

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Correct Option: A
Explanation:

DDT (Dichloro diphenyl trichloroethane) is one of the most well-known synthetic pesticide. It is non-biodegradable i.e., it cannot be degraded by microorganisms.