Modes of life 1.0 / 5 based on 1 rating ? GeologyA2/A-levelOCR Created by: sharna ramsdenCreated on: 29-05-13 14:55 Benthonic This means living on the bottom of the sea or a river, maybe in the sediment or on top of it. 1 of 15 Epifaunal Means living on top of a sediment or a substrate 2 of 15 Infaunal means living in the sediment, maybe a burrower 3 of 15 Pelagic means floating in the water column, usually the open sea 4 of 15 Planktonic means living in the water column 5 of 15 Morphology Describes the shape of the organism 6 of 15 The Substrate the sediment or rock at the bottom of the sea. 7 of 15 Symbiotic Relationship describes two organisms living together for mutual benefit, neither of which can successfully live without the other 8 of 15 A soft sediment is a fine sediment, such as mud or clay 9 of 15 Nektonic means the organism actively swims in the water column 10 of 15 palaeocurrent the direction of water movement preserved in the fossil record 11 of 15 Terrestrial describes anything relating to land 12 of 15 tetrapod a creature with four limbs 13 of 15 Bipedal means to walk on two hind legs 14 of 15 Quadripedal means to walk on all four limbs 15 of 15
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