Living Organisims

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1. What problem does tobacco mosaic virus cause?

  • Discolouring of tobacco plant leaves
  • Changes to the leaves of other plants so they look like tobacco
  • Joining together of tobacco leaves to form a pattern
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2. Which statement about viruses is correct?

  • They only contain RNA
  • They have a protein coat
  • They can only reproduce inside animal cells

3. In plants, what are leaves examples of?

  • Organs
  • Organ systems
  • Tissues

4. Which process happens against a concentration gradient?

  • Active transport
  • Diffusion
  • Osmosis

5. What do animals, fungi and viruses have in common?

  • They cannot carry out photosynthesis
  • They consist of cells
  • They do not have cell walls


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