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Analiza. Productos agrícolas y especies ganaderas
EduBook Organización
- 3158 visitas
Observa estos gráficos y contesta: ¿Cuáles son los productos agrícolas de mayor producción? ¿Qué explotaciones ganaderas son las más numerosas? Busca información sobre los rendimientos…
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Check. Sexual reproduction in plants
EduBook Organización
- 3164 visitas
Remember what you have studied in this section and answer the questions: What is alternation of generations? What do spores and gametes develop into? What is a flower? What does a flower contain and protect?
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Reproduction in mammals
EduBook Organización
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3.1. Reproduction in mammals Mammals reproduce by internal fertilisation. They are viviparous. Males have a penis that they use to introduce sperm into the female's body. Fertilisation then takes…
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Final Autoevaluation 4.01 - Animal reproduction
EduBook Organización
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Answer true or false. Only birds are oviparous. Ovoviviparous animals reproduce through internal fertilisation. We talk about incomplete metamorphosis when there is a chrysalis stage. The mating season…
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Adrenaline prepares for action
EduBook Organización
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In situations of danger or fear, the adrenal glands produce a hormone called adrenaline. This prepares the body for action, like running or hiding. This is called the fight or flight response.…
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Think about it. Coordination systems
EduBook Organización
- 3168 visitas
Remember what you have studied in this section and answer the questions: When you first learn to do something, you are very slow, but with practice you get faster. With a classmate and then your class,…
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Calculate - End-of-unit activities
EduBook Organización
- 3167 visitas
How far does light travel through water in 10 s? A robot sent a signal at the speed of light from the planet Mars. It took 3 minutes to reach Earth. How far away is Mars? How far does sound travel…
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Check. Restoration and liberal revolutions (1815-1848)
EduBook Organización
- 3152 visitas
Remember what you have studied in this section and answer the questions: Describe the objectives of the Congress of Vienna. What measures were taken to achieve them? What countries made up the Holy…
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Find out more. The Rif war in Morocco and the Tragic Week
EduBook Organización
- 3166 visitas
After losing the Spanish-American War in 1898, Spain sought out new territories in Africa. The Algeciras Conference (1906) established a Spanish-French territory in Morocco, with Spain controlling the…
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Expresión vocal. Canción
EduBook Organización
- 3169 visitas
Expresión vocal. Canción Profesión. Oficios