13043911
Descrição
FlashCards por Mrs Z Rourke, atualizado more than 1 year ago
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Criado por Mrs Z Rourke
mais de 6 anos atrás
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| Questão | Responda |
| What do the arrows represent in a food chain and food web? | The arrows show the transfer of useful energy |
| What is a herbivore? | An organism that only eats plants |
| What is a carnivore? | An organism that only eats meat |
| What is an omnivore? | An organism that eats both meat and plants |
| What type of pyramid is shown in the diagram? | Pyramid of biomass |
| What type of pyramid is shown in the diagram? | Pyramid of number |
| What is a producer? | A plant, it is always the start of a food chain/food web |
| What is a primary consumer? | The organism that eats the producer |
| What is a secondary consumer? | The organism that eats the primary consumer |
| What is a tertiary consumer? | The organism that eats the secondary consumer |
| What do organisms compete for? | Food, shelter, water, mate |
| What is the source of all energy in food chains? | Light radiation from the sun |
| Why do plants need to capture light energy? | To carry out photosynthesis to produce glucose |
| Why is energy lost at each stage in the food chain? | Not all of the organism is eaten )the bones, roots etc) Waste materials from organisms (faeces) Energy lost as heat during respiration |
| What is intensive farming? | Intensive farming is a type of farming which produces as much food as possible by making full use of the land. The aim is to maximize yields. |
| What factors need to be controlled in intensive farming? | 1. Temperature - animals will use less energy if their environment is warm 2. Restrict movement - the more animals move, the more energy is wasted 3. Food - use high protein diet to promote growth 4. Security - animals need to be kept safe from predators 5. Antibiotics - to prevent the spread of disease |
| What are the problems with using chemicals in intensive farming? | Fertilisers can cause eutrophication Pesticides can have unintended effects on insects such as bees Overuse of antibiotics has led to antibiotic resistant bacteria |
| What is bioaccumulation? | Heavy metals, present in industrial waste and pesticides, enter the food chain, accumulate in animal bodies and may reach a toxic level |
| What is eutrophication? | 1. Untreated sewage and fertilisers may run into water and cause rapid growth of plants and algae. 2. These then die and are decomposed; the microbes, which break them down, increase in number and use up the dissolved oxygen in the water. 3. Animals which live in the water may suffocate |
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