Download App

Evolution — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYEvolution3 Marks
Question
Differentiate between divergent and convergent evolution. Give one example of each.
✓

Answer

 
Divergent
Convergent
1.
same structure developed along different direction.
Different structures evolving for the same function.
2.
due to adaptation to different needs.
due to adaptation to meet similar needs.
3.
Examples:
  • Vertebrates heart & brain
  • thorn of Bougainvillea and tendrils of cucurbita
  • fore limbs of whales, bat, cheetah, humans.
Examples:
  • Wing of bird & insects
  • Potato & sweet potato
  • Eye of Octopus & mammals
  • Flippers of Penguins & dolphin

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→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Define pollination. Explain any two contrivances of self-pollination.
→
Two children, A and B aged 4 and 5 years respectively visited a hospital with a similar genetic disorder. The girl A was provided enzyme-replacement therapy and was advised to revisit periodically for further treatment. The girl, B was, however, given a therapy that did not require revisit for further treatment.
  1. Name the ailments the two girls were suffering from?
  2. Why did the treatment provided to girl A required repeated visits?
  3. How was the girl B cured permanently?
→
What are called pathogens? Give information about it? (with example).
→
What is molecular homology? Cite one example.
→
How does yeast reproduce asexually? Show it diagrammatically.
→
What is meant by metastasis? ### Give difference between Benign and Malignant cancer and explain the agents responsible for transformation of Normal cells into cancerous cells.
→
AtRNA is charged with the amino acid phenylalanine.
  1. At what end of the tRNA is the amino acid attached?
  2. What is the mRNA codon that codes for phenylalanine?
  3. Name the enzyme responsible for this attachment.
→
Write the differences between male and female gametophyte.
→
Given below is a part of the template strand of a structural gene:
TAC CAT TAG GAT
  1. Write its transcribed mRNA strand with its polarity.
  2. Explain the mechanism involved in initiation of transcription of this strand.
→

Why do you see two different types of replicating strands in the given DNA replication fork? Explain. Name these strands.
→