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Vegetative Reproduction Link the type of asexual reproduction with the crop. The first one is done for you. Tubers ginger Rhizomes onion Bulbs strawberry Runners potato 5 minutes Runners eg. Strawberry plants Rhizomes eg. Ginger Bulbs eg. onions Soil cultivation Single Digging or Bastard Trenching What does it do for the soil? How does cultivating/digging improve the soil? Pick five of the following: •aerates the soil •removes weeds •changes the soil colour •washes the soil away •improves drainage •FYM can be added to improve crumb structure •raked to produce a good tilth 10 minutes Seed germination 1. Put the labels on the diagram 1 2 2. What three things are essential for germination? 4 1. plumule radicle testa cotyledon 3 2. oxygen light warmth water 10 minutes Seed Germination Testa (Seed Coat) Plumule Tough, so water is needed to swell the seed and break the testa before the seed can germinate Young shoot Radicle Cotyledons (Food Store) Glucose + Oxygen Young root Energy Enzymes are needed for respiration therefore seeds only germinate in the warmth Light is not usually needed for germination except in certain seeds such as lettuce • light sensors • temperature probes • panic buttons • carbon dioxide sensors • pH meters • fire extinguishers • humidity sensors • music players Pick the 5 useful devices for these places 10 minutes Problems when storing crops Link the problem with its consequence These will eat the crop or damage it with faeces and other wastes Bruising If crops are too ripe they will spoil before they can be used These can discolour, flavour or rot away the crop Damaged crops allow in microbes that will infect the crop Ripening Diseases Pests 10 minutes Problems when storing crops Link the problem with its consequence These will eat the crop or damage it with faeces and other wastes Bruising Damaged crops allow in microbes that will infect the crop These can discolour, flavour or rot away the crop If crops are too ripe they will spoil before they can be used Ripening Diseases Pests 10 minutes Problems when storing crops Link the problem with its consequence These will eat the crop or damage it with faeces and other wastes Bruising Damaged crops allow in microbes that will infect the crop These can discolour, flavour or rot away the crop Ripening If crops are too ripe they will spoil before they can be used 10 minutes Diseases Pests Problems when storing crops Link the problem with its consequence These will eat the crop or damage it with faeces and other wastes Bruising Damaged crops allow in microbes that will infect the crop Diseases These can discolour, flavour or rot away the crop Ripening If crops are too ripe they will spoil before they can be used 10 minutes Pests Problems when storing crops Link the problem with its consequence Bruising Damaged crops allow in microbes that will infect the crop Diseases These can discolour, flavour or rot away the crop Pests Ripening If crops are too ripe they will spoil before they can be used 10 minutes These will eat the crop or damage it with faeces and other wastes Revision quiz ANSWER 5. What does asexual mean? ANSWER 4. What two things does the flower oforan insect-pollinated ANSWER 3. What are the disadvantages of cross pollination? 2. Which is easier to spread, organic inorganic ANSWER 1.plant What parts of the plantto does a lack of have to attract insects it? Nectar Without glands, the brightly fori.e. sex coloured cells, apetals. male and female parent, fertilisers? It requires a need vector; something toitcarry the pollen Inorganic fertiliser – because is usually in the (1) phosphorus (1) roots seeds, fertilisation, pollination. from one plant to another. form of an easy liquid (2) nitrogen or granules. (2) leaves and shoots (3) potassium (3) flowers and fruits affect? 10 minutes B491 Revision 2.