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Sexual reproduction in plants
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3.1. The life cycle of a plant Plants reproduce by alternation of generations. This means that two types of organisms or different generations alternate during a plant's life cycle or biological…
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The process of plant reproduction
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The pollen grains fall on the pistil. It can be the same flower or a different flower. The flower is pollinated. The ovule becomes a seed. The pistil grows into a fruit. The other parts of the flower…
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True/false. Women and the French Revolution
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Are the following sentences true or false?: The Marquis de Condorcet called for the recognition of women's rights. The 1791 Constitution recognised all women's rights. Among the reforms adopted…
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Read and complete
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Read and complete: We know about our past because of written and sources. Non-written sources can be visual documents, testimonies or old buildings. The past of our family is called our family . The…
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Arthropods
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Characteristics of arthropods Arthropods are the largest animal group on Earth. The most characteristic feature of arthropods is their external skeleton. The articulated exoskeleton (external skeleton)…
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True/false. Transporting water from the root to the leaves
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Answer true or false: Transpiration of water through the stomata in the leaves is a continuous evaporation process. The xylem vessels are very thin in diameter. Less than 1 mm in diameter. A stoma is a…
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Summaries - Light and sound
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1. Light Light is a form of energy. Light sources produce light. There are two types of light: natural light sources, like the Sun and artificial light sources, like light bulbs. Light waves travel in…
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Reading
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It is a sunny afternoon. Alice and her sister are sitting by the river. Alice’s sister is reading a book with no pictures. ‘I don’t like books without any pictures,’ Alice thinks. She is sleepy.…
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Activities - Machines
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We use machines in many different ways. Machines help to make our work easier. We use them every day. We use different machines for different things. What we use a machine for is called its function. We…
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Introduction - Nutrition, breathing and circulation
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Our body needs nutrients and oxygen to live and grow. We obtain nutrients from food, and oxygen from the air. In our body, the digestive system gives us the nutrients that we need, and the respiratory…
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