module 4- Evolution

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  • Created by: Princia_
  • Created on: 16-05-18 12:30

1. How does genetic variation arise within a species?

  • Independent assortment and crossing over of DNA during meiosis, Mutations, Alleles .
  • Mitosis, Mutations and independent assortment.
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Other questions in this quiz

2. What is a homologous structure?

  • An organ or a bone that appers in different organism that demonstrate that they share a common ancestor.
  • When different species have similar structures due to them being adapted to similar environments.
  • Feautures that evolve in different organisms that have the same function.
  • When organisms share similar characterisitcs due to them have a common ancestor.

3. Why are Hybrid's infertile?

  • They contain an odd number of chromosomes.
  • The foetus fails to develop after fertiliisation.
  • They are sexually incompatible.
  • The sperm cannot reach the egg.

4. A harmless snake mimicks the colours of a venomous snake. What type of adaptation is this?

  • Anatomical
  • Physiological
  • Behavioural
  • Biochemical

5. What is the importance of binomial nomenclature.

  • It avoids confusion as each organism has a unique name. It is universally recognised.
  • It makes it easier to name organisms. It avoids organisms being mistaken.
  • Organisms can be easily identified.

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