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Evolution · Question 104

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

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)

AIPMT 2002

Keep practising — Evolution

2

Genetic drift operates in : -

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

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

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

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
AIPMT 2002
5

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

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

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

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

In which era reptiles were dominant ?

  1. Archaeozoic era
  2. Mesozoic era
  3. Coenozoic era
  4. Paleozoic era
AIPMT 2002
8

Half life period of C14 is : -

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

Similarities in organism with different genotype indicates : -

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

Reason of diversity in living beings : -

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

Which of the following is closest relative of man ?

  1. Gorilla
  2. Chimpanzee
  3. Gibbon
  4. Orangutan
AIPMT 2001

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