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The removal of cell waste
EduBook Organización
- 2018 visitas
4.1. What does excretion consist of? Cell activity produces waste products like carbon dioxide or urea. These substances are toxic for the organism if they accumulate. The function of excretion is…
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Summaries - Waves. Light and sound
EduBook Organización
- 1991 visitas
1. Waves An oscillatory or vibratory motion takes place around a central position. It produces the same amount of movement on both sides of this position. A wave is the transmission of an oscillatory or…
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Comprehension check (KET)
EduBook Organización
- 1953 visitas
Are the sentences “Right” or “Wrong”? If there is not enough information to answer “Right” or “Wrong”, choose “Doesn’t say”. Marilla makes a lot of good things to eat for the…
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Describe. Foreigners by autonomous community in 2010
EduBook Organización
- 1981 visitas
Look at the map of the foreign population in each autonomous community in 2010 and answer the questions: Which autonomous community has the highest number of immigrants? What percentage of the total…
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Look at this historical document showing some peasants in the Middle Ag...
EduBook Organización
- 1913 visitas
Look at this historical document showing some peasants in the Middle Ages and answer the questions: What type of historical document is it? What does it show? What clothes are the peasants wearing? What…
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Aquaculture
EduBook Organización
- 1918 visitas
Aquaculture is an alternative to fishing. It consists of farming marine animals and plants in pools, ponds or enclosed areas of the coast. Aquaculture is practised extensively in China, Russia,…
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A Drink Called Tea - A Drink Called Tea
EduBook Organización
- 1890 visitas
What is tea? Tea comes from the dry leaves1 of the Camellia sinensis plant. This plant grows in high places with hot weather and a lot of rain. There are three types of tea: black, green and oolong.…
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Conjunctions - Understanding the text
EduBook Organización
- 1892 visitas
“I’M NOT DEAD, BUT MY LEG HURTS A LOT,” SAYS ANNE. In this sentence but is a conjunction. Conjunctions join different ideas in sentence. Complete each of the following sentences with one of the…
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Answer. Plant nutrition
EduBook Organización
- 1877 visitas
Remember what you have studied in this section and answer the questions: What is photosynthesis? Why are chloroplasts green? How do algae and mosses get the water and carbon dioxide they need? How do…
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Different types of corolla
EduBook Organización
- 1877 visitas
The petals of a flower usually all look the same, like the wild rose. Some flowers have a very distinct shape, as in the example of the broad bean. Other flowers, like tulips, have similar petals and…