Download App

Evolution — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYEvolution3 Marks
Question
Differentiate between homology and analogy. Give one example of each.
✓

Answer

Homology

Analogy

Organisms having the same structure developed along different directions due to adaptations/different functions.

Different structures having the same function. (in different organisms)

Result of divergent evolution.

 Result of convergent evolution.
Indicates common ancestry. Does not indicate common ancestry.
Anatomically same structures. Anatomically different structures.

Example:

Forelimbs of whale - bats - cheetah – human//

Thorns of Bougainvillea - tendrils of cucurbits.

Example:

Wings of butterfly and birds//

Sweet potato and potato.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Evolution→Evolution — all question types→BIOLOGY STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

  1. What are transgenic animals?
  2. Name the transgenic animal having the largest number amongst all the existing transgenic animals.
  3. Mention any three purposes for which these animals are produced.
→
  1. Name the ancestors of progymnosperm.
  2. Name the ancestors of herbaceous and arborescent lycopod.
  3. Name the ancestors of cycads.
→
Answer the following questions:
Why are grasshopper and Drosophila said to show male heterogamety? Explain.
→
The species diversity of plants (22 per cent) is much less than that of animals (72 per cent). What could be the explanations to how animals achieved greater diversification?
→
A spermatogonial cell has 30 chromosomes. How many chromosomes will be found in:
  1. The primary spermatocyte.
  2. The spermatid?
→
  1. Write the two limitations of traditional breeding technique that led to promotion of micro propagation.
  2. Mention two advantages of micro propagation.
  3. Give two examples where it is commercially adopted.
→
Write the causes and symptoms of pheny ketonuria and sickle cell anemia.
→
  1. Explain the barrier methods of birth control.
  2. How is GIFT different from ZIFT?
→
Write important features of a sedimentary cycle in an ecosystem.
→
‘Fertilisation is not an obligatory event for fruit production in certain plants’. Explain the statement.
→