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Video: Texas Resident Wins Award for Challenging Oil Refineries
Esl video Organización
- 2756 visitas
This 3 minute report from Voice of America features the environmental struggle of Hilton Kelly against an oil processing plant in his hometown. This was releasing toxins which caused respiratory…
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The discovery of the cell
EduBook Organización
- 1908 visitas
The discovery of the cell did not occur until after the invention of the microscope, in 1590. In 1665, the English scientist Robert Hooke published the first description of cells when he examined…
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Reproduction in flowering plants
EduBook Organización
- 1911 visitas
Some plant species reproduce asexually, but most plants reproduce sexually. A pollen grain fertilises the egg cell inside the ovule. The sexual organs of spermatophytes (flowering plants) are in the…
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Fungi - Fungi
EduBook Organización
- 1895 visitas
Fungi are an important group of living things. This group includes mould and mushrooms. Fungi are different from animals and plants. Like animals, fungi feed on organic matter from other organisms.…
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Pollination, fertilisation and the formation of seeds
EduBook Organización
- 1696 visitas
Pollination Sexual reproduction in plants occurs when a spermatozoid meets an ovule. For this to happen, the pollen grains need to travel from the stamens to the pistil. This process of transferring…
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Learn. Biomes - The natural environment. Ecosystems
EduBook Organización
- 1601 visitas
The name biome is given to zones of the Earth which have similar plant and animal populations. Each biome spreads over a large area, including different continents. On a given continent, there can be…
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Unit 2: The Earth's climate zones
EduBook Organización
- 1565 visitas
Bush (n): a large plant with lots of branches that is smaller than a tree and grows close to the ground. desert (n): an area of land that receives less than 250 mm of rain per year. Deserts can be hot,…
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Learn. Observe the parts of a flower
EduBook Organización
- 1458 visitas
What do we need? A flower A magnifying glass Tweezers Coloured pencils What do we do? Write down the name of the plant you are going to observe. Look at the sepals that make up the calyx. They are…
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The extinction of the dinosaurs
EduBook Organización
- 1438 visitas
In 1980, American scientists proposed that the cause of the extinction of the dinosaurs, which occurred about 65 million years ago, was the result of a meteorite hitting Earth. According to this…
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True/false. Fruit and the dispersal of seeds
EduBook Organización
- 1438 visitas
Decide if the following statements are true or false : Seeds need to stay near to the parent plant to grow well. ➝ Fruits can contain many seeds or only one. ➝ Fruit can be classified into five main…