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4
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Coral reefs are made up of ________ which are tiny organisms that look like rocks
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6
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Coral reef biomes are naturally colourful because of the ______
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7
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Coral atolls are made from _________ remains
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8
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A group of coral is called a ________
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10
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Coral reefs take a long time to grow. Their growth rate is around _______________ per year
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11
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Coral reefs are found in shallow water because the algae that live with them need sunlight for _________
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12
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Fringing reefs can be found along the ___________
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14
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Nearly ___________ of the world's coral reefs are threatened by human activity
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15
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Coral reefs are mostly found in ________ areas
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16
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Although there are many types of animals that live within the coral reef biome, it has much more _________ in its plant life
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1
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Coral reef plants and animals are important sources of new ___________ being developed to treat cancer, arthritis, human bacterial infections, Alzheimer's disease, heart disease, viruses and other diseases
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2
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The diversity of the species living within different coral reefs depends on the reef's ________ and the direction of the water
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3
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Barrier reefs are found near ________ and develop a barrier between the reef and the lagoon
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5
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Coral reefs exist in __________ water
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9
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What is the largest coral reef biome in the world?
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13
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Coral are not ________. They're actually animals and are amazingly enough, relatives of jellyfish and anemones
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