Biology: The a nature and variety of living organisms

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1. What are the characteristics of bacteria?

  • Do not have a nucleus, have a circular chromosome of DNA, can photosynthesise, single cell, feed off other organisms
  • Feed off other organisms, have a circular chromosome DNA, nucleus, multicellular
  • Reproduce rapidly, circular chromosome DNA, single celled
  • Small, do not have a nucleus, photosynthesise, no circular chromosome DNA
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2. What are the features of fungi?

  • Cannot photosynthesise, Store carbohydrate, single cells, body called a mycelium
  • Have a body called mycelium which is made up of hyphae, cannot photosynthesise, cell walls made of chitin, single cell, feed by sapotrophic nutrition, store carbohydrate is glycogen
  • Single cells, body called a mycelium, store carbohydrate as glycogen, cell walls made of chitin
  • Photosynthesise, cells made out of chitin, sapotrophic nutrition, single cells

3. What are the features of viruses?

  • Particles rather than cells, smaller than bacteria, only reproduce inside living cells, in effect all types of organisms, come in all different shapes and sizes, do not have a cellular structure, have a protein coat around some genetic material
  • Protein coates, genetic material, different shapes and sizes, infects all type of living organisms
  • Have a nucleus, small, reproduce, infect all types of living organisms
  • Protein coats, small, these of other organisms, single cells, chloroplasts

4. What is meant by the term pathogen?

  • An organism that causes disease
  • An organism that protects you from diseases
  • Something that makes you ill
  • A pest that can cause disease

5. What is sapotropic nutrition?

  • They secrete extracellular enzymes into the area outside their body to dissolve their food so they can then absorb the nutrients
  • They secrete enzymes into the outside area of their body and then take the nutrients in again
  • It is the secretion and taking in other enzymes from outside of their body
  • It is the way that fungi feed from the outside of their body


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