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Check your progress 1, 4 (b No, more seeds germinate in the dark than…
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b No, more seeds germinate in the dark than light
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B) Dispersal of seeds is very important for the survival of plant species. If plants grow too closely together, they have to compete for resources they need.
C) Animals can disperse seeds by excreting or burying them other fruis have structures, such as hooks that attach themselves to the animal's fur.
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D)
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B: The bean pods explode and shoots out their seeds. Because bean pods dry out and explode in hot weather when the seeds are ripe.
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B) Beetles, Bees and butterfly.
C) Flower A because flowers pollinated by wind are not brightly coloured and do not have petals or scent. Wind pollinated flowers make lots of pollen.
A) insect-pollinated flowers are often brightly coloured, have scent and nectar so that the insect comes into the flower and collects or leave pollen .
4 germination, growth, pollination, fertilisation, seed production, seed dispersal
5: A) A is missing light, B is missing water.
B) Air.
C) Plant use light to make food that gives them energy to grow.
When a plant produces flowers, the flowers usually last only a few days. Then they wither and fall off the plant. However, part of the flower stays behind on the plant. This part becomes the fruit. The seeds form inside the fruit. The seeds grow into new plants. The new plants grow and produce flowers to form new fruits and seeds. So flowers help the plant reproduce to form new plants.
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Seedlings need room to grow. They also need light and water. Seedlings cannot grow to be healthy plants if they all have to share water and light in a small area. Plants disperse their seeds in different way.
Some seeds are dispersed by animals
Animals can speard seeds. Birds, monkeys and even elephants eat colourful, juicy fruits. The seeds pass through the animals's body and are dispersed in the animal's droppings. This may be far away from where the animal ate the fruit.
Some seeds have spines and hooks. These stick onto the fur of animals, or the clothes of people.
Mice, ants and squirrels carry seeds from the parent plant and bury them to eat later. If the animals does not eat the seeds, the seeds will germinate in soil.