Recursos educativos página 12349

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Contesta. El desenvolupament de l'embrió
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Recorda el que has treballat en aquest apartat i contesta: Explica quines diferències hi ha entre un zigot i un ou. I entre un zigot i un embrió? Quines funcions tenen els ous? Pots explicar per què…
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Altres tipus de reproducció vegetal
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La reproducció asexual de les fanerògames En la reproducció asexual, un sol individu és capaç de produir descendents sense ajuda d'un altre. Aquest tipus de reproducció també es dóna en les…
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Materials artificials
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Principals materials artificials De materials artificials, n'hi ha molts; aquí n'assenyalem breument els més importants. Aliatges Els aliatges són mescles de metalls i altres substàncies.…
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Spain
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The location of Spain Spain is located in the south-west of Europe. It occupies an area of 505900 km². Spanish territory includes most of the Iberian Peninsula, the Balearic Islands, the Canary Islands…
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Complete. The Guadalquivir river basin
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Complete the text with the correct words: The Guadalquivir river basin is located in the of the Peninsula, between the Sierra and the Cordillera . The river and its tributaries flow into the Ocean.
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Final self-evaluation 01 - Prehistory
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Complete the sentences with the correct words: The Palaeolithic period began when the first beings appeared and ended with the discovery of . The people of the Palaeolithic period were predators: they…
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Answer. Amniotic fluid
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In order to be protected inside the uterus, the fetus or embryo is surrounded by a bag that contains a liquid called amniotic fluid: Make a drawing of the photo of the fetus in your notebook, and label…
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Look and answer. The salmon
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Look at the close-up of the salmon ova and sperm. Then answer the questions below. Where does fertilisation take place? Is it external or internal in salmon? What do the ova and sperm look like? How do…
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Observe. Development of an embryo
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The photos show the development of a chicken embryo. The embryo develops until it becomes a chick. It then hatches from the egg. At 5 days, there are thin red blood vessels that extend from the embryo,…
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Answer. States of matter
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Remember what you have studied in this section and answer the questions: What are the three different states of matter? What are the four different changes of state?
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