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Introduction - The natural environment. Ecosystems
EduBook Organización
- 3658 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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Check. Test yourself
EduBook Organización
- 3593 visitas
Remember what you have studied in this section and answer the questions: In what way are the feeding characteristics of a coelenterate and a planarian similar? What type of circulatory system do the…
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Investigate - The natural environment. Ecosystems
EduBook Organización
- 3543 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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End-of-unit activities - The natural environment. Ecosystems
EduBook Organización
- 3379 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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End-of-unit evaluation - The natural environment. Ecosystems
EduBook Organización
- 3335 visitas
Most of the energy used by living things originally comes from sunlight which is trapped by autotrophs (or producers). This energy is then transferred from the producers to all other living things…
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Think about it. Trophic relationships in ecosystems
EduBook Organización
- 2417 visitas
Remember what you have studied in this section and answer the questions: Are feeding relationships intraspecific or interspecific? Explain your answer. Why can there only be four or five trophic levels?…
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Video: The best job in the world
Esl video Organización
- 2465 visitas
This video advertises the Great Barrier Reef. It catches our attention by pretending to look for an Island Caretaker, whose responsibilities are cleaning the pool, feeding the fish, collecting the mail,…
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Summaries - Animal nutrition
EduBook Organización
- 3602 visitas
1. Feeding and digestion in animals Animals are heterotrophic; they need to find food and transform it to get nutrients. These substances provide energy and materials the animal needs to grow, make new…
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Analyse a text
EduBook Organización
- 3140 visitas
The feeding habits of starfish Starfish have a voracious appetite; in one week an adult starfish can devour over fifty clams or small oysters. When an oyster is attacked, it closes its valves, but the…
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Asturian workers' demands
EduBook Organización
- 3112 visitas
Wage increases (…). Six-hour shifts for workers during the day and at night (…). Equal wages for equal jobs. Two months of paid holiday per year. The payment of 75 % of wages to unemployed workers…
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