Tag: universe and organic evolution

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Questions Related to universe and organic evolution

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

Neo-Darwinism believes that new species develop through

  1. Continuous variations and natural selection

  2. Mutation with natural selection

  3. Hybridization

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

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
Multiple choice zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

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

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

Darwin delayed publishing 'On the Origin of Species' for many years because he was acutely aware of the controversial nature of his theory and the potential social and religious backlash.

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

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

  1. Insectivorous

  2. Vegetarian

  3. Seed eating

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

Darwin's finches are believed to have originated from a common ancestor that was an insectivorous ground-dwelling bird from the mainland.

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

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?

  1. Two

  2. One

  3. Three

  4. Four
Reveal answer Fill a bubble to check yourself
B Correct answer
Multiple choice zoology universe and organic evolution darwin's theory of evolution process of evolution lamarckism

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

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

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

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

Darwin's theory of natural selection was criticized because it could not explain the origin of variations or the mechanism of inheritance. Option B correctly identifies this limitation regarding inherited characters.