Science Revision 9A

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  • Created by: Callan
  • Created on: 10-05-13 15:27

1. How does a plant breeder make sure that only pollen from one flower pollinates another flower?

  • They inject sulphur dioxide solution into the anthers.
  • They put a plastic bag over the flower.
  • They can't, arranged marriages aren't effective.
  • They take it into a separate room without other flowers.
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Other questions in this quiz

2. What does 'genetic information' mean?

  • Information scientists have gathered whilst studying genes.
  • The instructions found in genes that control your characteristics.
  • The facts you know about genes.
  • Sex chromosomes e.g. X or Y

3. State one variation of pear trees and the environmental factor that causes it.

  • Smaller leaves - not enough oxygen.
  • Thicker trunk - Being on the side of a mountain.
  • Larger leaves - not enough light.
  • Thicker roots - drought.

4. For a recessive allele to have an effect, the alleles on both chromosomes must be:

  • One recessive and the other dominant.
  • Different sizes.
  • Recessive.
  • Dominant.

5. Why are some people against GM crops?

  • Because it makes them uncookable.
  • Becaus they think the chemicals can affect their systems.
  • Because they alter the taste of the plant.
  • Because it's against their religion.
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