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Evolution · Question 64

AIPMT 2009MCQEasy📈 Topic in 12% papers+4−1
1

In the case of peppered moth ( Biston betularia) the black-coloured form became dominant over the light-coloured form in England during industrial revolution. This is an example of -

  1. Natural selection whereby the darker forms were selected
  2. Protective mimicry
  3. Inheritance of darker colour character acquired due to the darker environment
  4. Appearance of the darker coloured individuals due to very poor sunlight

Answer

(1) Natural selection whereby the darker forms were selected

Solution

As per NCERT, after industrialisation the tree trunks became dark due to soot and the lichens died.

⇒ Against the dark background, white-winged moths were easily picked out by predators, while dark-winged moths survived.

∴ The dark form increased in number — an example of natural selection (industrial melanism), not acquired inheritance or mimicry.

Answer: (1)

AIPMT 2009

Keep practising — Evolution

2

Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?

  1. Nephridia of earthworm and Malpighian tubules of cockroach - excretory organs
  2. Wings of honey bee and wings of crow - homologous organs
  3. Thorn of Bougainvillea and tendrils of Cucurbita - analogous organs
  4. Nictitating membrane and blind spot in human eye - vestigial organs
AIPMT 2008
3

Darwin's finches are a good example of –

  1. Convergent evolution
  2. Adaptive radiation
  3. Connecting link
  4. Industrial melanism
AIPMT 2008
4

Which one of the following scientist's name is correctly matched with the theory put forth by him?

  1. Mendel — Theory of pangenesis
  2. de Vries — Natural selection
  3. Pasteur — Inheritance of acquired characters
  4. Weismann — Theory of continuity of germplasm
AIPMT 2008
5

Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?

  1. They could separate combinations of molecules from the surroundings
  2. They were able to reproduce
  3. They were partially isolated from the surroundings
  4. They could maintain an internal environment
AIPMT 2008
6

Thorn of Bougainvillea and tendril of Cucurbita are examples of:

  1. analogous organs
  2. homologous organs
  3. vestigial organs
  4. retrogressive evolution
AIPMT 2008
7

The concept of chemical evolution is based on-

  1. Crystallization of chemicals
  2. Effect of solar radiation on chemicals
  3. Possible origin of life by combination of chemicals under suitable environmental conditions
  4. Interaction of water, air and clay under intense heat
AIPMT 2007
8

The finches of Galapagos islands provide an evidence in favour of-

  1. Special Creation
  2. Biogeographical Evolution
  3. Evolution due to Mutation
  4. Retrogressive Evolution
AIPMT 2007
9

When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed:-

  1. Microevolution
  2. Convergent evolution
  3. Co-evolution
  4. Divergent evolution
AIPMT 2007
10

Adaptive radiation refers to:-

  1. Adaptations due to Geographical isolation
  2. Migration of members of a species to different geographical areas
  3. Evolution of different species from a common ancestor
  4. Power of adaptation in an individual to a variety of environments
AIPMT 2007
11

If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur:-

  1. A normal distribution
  2. A T-shaped curve
  3. A skewed curve
  4. A bi-modal distribution
AIPMT 2007

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