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The first humans. The Palaeolithic Age
EduBook Organización
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1.1. Human evolution About six million years ago in Africa, some primates began to adapt to new climatic conditions. These first hominids evolved over time into human species. The most important changes…
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Check. The consequences of colonisation
EduBook Organización
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Remember what you have studied in this section and answer the questions: How were local landscapes affected by the process of colonisation? What were the negative effects of improved health and…
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The importance of plants in everyday life
EduBook Organización
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Part of our diet is made up of plant products. They are very important. They provide us with carbohydrates, vitamins, mineral salts and fibre, which are all essential for a healthy diet. When we eat…
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Internal geodynamics and surface relief
EduBook Organización
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The forces inside the Earth cause mountain chains to form They also deform rocks and form folds, or break rocks and cause geological faults or joints. 6.1. Mountain ranges Mountain ranges are chains of…
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Complete. A summary of plant reproduction
EduBook Organización
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Write these words in the correct spaces: bulbs zygote spores ovule stamens tubers calyx seed germination transferring pistil embryo stamens A flower is made up of a , a corolla, and a pistil.…
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Pollination, fertilisation and the formation of seeds
EduBook Organización
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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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Video: Protein Synthesis
Tiching explorer Organización
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This animated presentation explains the transcription and translation process to build cellular proteins out of DNA. We compare prokaryotic and eukaryotic protein synthesis and focus on the former. We…
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Self-evaluation 3 - Society and the environment
EduBook Organización
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Which concept refers to each of the following definitions: Contamination of the atmosphere caused by different agents, such as factories and motor vehicles. A gradual alteration in the planet's…
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Correct. Birth
EduBook Organización
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Correct the underlined mistakes in the text with the correct words: umbilical caesarian section fetus navel vagina ova zygote sperm Birth is the process in which the embryo is born, it travels from the…
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Unit 8: The Earth, a Living Planet
EduBook Organización
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Asexual reproduction (n): the process of reproduction of a single organism by itself. autotroph (n): an organism that produces its own food for nutrition. bioelement (n): any of the chemical elements…
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