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Biology
Human Nutrition Chapter 28
| Question | Answer |
|---|---|
| What is nutrition? | Nutrition is the way in which an organism gets and uses its food. |
| What are the two main types of nutrition? Explain. | Autotrophic - an organism makes its own food e.g. plants by photosynthesis Heterotrophic - an organism takes in food from its environment e.g. animals, fungi, bacteria |
| What are the three types of heterotrophs? | Herbivores (feed on plants) Carnivores (feed on other animals) Omnivores (feed on plants and animals) |
| What are the two subdivisions of heterotrophs? | Parasites and Saprophytes |
| Where do they get their food? | Parasites take in their food from a live source e.g. fleas and disease-causing bacteria Saprophytes take in their food from a dead source e.g. bacteria and fungi that cause decay |
| Do all animals have a digestive system? Prove your answer. | No e.g. tapeworms and some sponges. Instead each cell in these animals have a full range of digestive enzymes. |
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