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Evolution

AIPMT 2002MCQEasy📈 Topic in 75% papers+4−1
Ques. 1AIPMT 2002

Which of the following are homologous organs ?

  1. Wings of birds & Pectoral fins of fish
  2. Wings of bat & Butterfly
  3. Legs of frog & Cockroach
  4. Wings of birds & Locust

Answer

(1) Wings of birds & Pectoral fins of fish

Solution

As per NCERT, homologous organs have the same basic structure and origin but may perform different functions (divergent evolution), e.g., forelimbs of whales, bats, cheetah and human.

Wings of birds and pectoral fins of fish are both vertebrate forelimb structures with a common origin ⇒ homologous.

Wings of bat & butterfly, legs of frog & cockroach, wings of birds & locust: same function but different structure and origin ⇒ analogous.

Answer: (1)

Keep practising — Evolution

Ques. 2AIPMT 2002

Genetic drift operates in : -

  1. Slow reproductive population
  2. Small isolated population
  3. Large isolated population
  4. Fast reproductive population
Ques. 3AIPMT 2002

There is no life on moon due to the absence of -

  1. O2
  2. Light
  3. Water
  4. Temperature
Ques. 4AIPMT 2002

According to fossils which discovered up to present time, origin and evolution of man was started from

  1. Java
  2. Africa
  3. China
  4. France
Ques. 5AIPMT 2002

In which condition, the gene ratio remains constant for any species population ?

  1. Gene flow
  2. Mutation
  3. Sexual selection
  4. Random mating
Ques. 6AIPMT 2002

Sequence of which of the following is used to know the phylogeny ?

  1. DNA
  2. r-RNA
  3. m-RNA
  4. t-RNA
Ques. 7AIPMT 2002

In which era reptiles were dominant ?

  1. Archaeozoic era
  2. Mesozoic era
  3. Coenozoic era
  4. Paleozoic era
Ques. 8AIPMT 2001

Half life period of C14 is : -

  1. 5000 years
  2. 50 years
  3. 500 years
  4. 5 104 years
Ques. 9AIPMT 2001

Similarities in organism with different genotype indicates : -

  1. Divergent evolution
  2. Macroevolution
  3. Convergent evolution
  4. Microevolution
Ques. 10AIPMT 2001

Reason of diversity in living beings : -

  1. Mutation
  2. Short term evolutionary change
  3. Long term evolutionary change
  4. Gradual change
Ques. 11AIPMT 2001

Which of the following is closest relative of man ?

  1. Gorilla
  2. Chimpanzee
  3. Gibbon
  4. Orangutan

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