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The five groups of vertebrates
EduBook Organización
- 3886 visitas
Fish have an elongated body and swim using their fins. Amphibians live part of their life in water. Their skin is moist and slippery. Reptiles crawl to move around. Their bodies are covered with hard…
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End-of-unit evaluation - The Animal Kingdom (II). Vertebrates
EduBook Organización
- 3677 visitas
There are around 50000 species of vertebrates, classified into five main groups: fish, amphibians, reptiles, birds and mammals. Fish are the most primitive group and they have the highest number of…
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Introduction - The Animal Kingdom (II). Vertebrates
EduBook Organización
- 3579 visitas
There are around 50000 species of vertebrates, classified into five main groups: fish, amphibians, reptiles, birds and mammals. Fish are the most primitive group and they have the highest number of…
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Summaries - Animals
EduBook Organización
- 2264 visitas
1. Vertebrates Vertebrates are the group which contains the human species. They have an internal skeleton, made of bones. The name comes from the vertebrae, which make up the spine (backbone), which…
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European biodiversity under threat: lynx, a symbol and a challenge
EducaMadrid Organización
- 6070 visitas
The fauna of de European Union consists of more than 370 million Homo sapiens; it also includes 150 species of mammals, 520 bird species, 180 species of reptiles and amphibians, 150 species of fish and…
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Whales - Whales
EduBook Organización
- 1642 visitas
What do you know about whales? Here are some interesting facts. Whales live in the sea, but they are not fish, they are mammals.1 They need air to live. They must come up to the top of the water often…
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Halting the loss of Europe's biodiversity by 2010
EducaMadrid Organización
- 7513 visitas
42% of Europe's native mammals are threatened with extinction, 43% of birds, 45% of butterflies, 52% of freshwater fish. The list goes on and makes terrifying reading. Worldwide, the loss of species is…
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