Reasons for features of brachiopod adaptations 0.0 / 5 ? GeologyReasons for features of brachiopod adaptationsA2/A-levelOCR Created by: LindaMariaCreated on: 27-02-14 22:24 A large pedicle opening To support a large pedicle for secure attachment to the substrate 1 of 10 Strongly ribbed valves To strengthen shell against wave action 2 of 10 Folded or zig-zag margin To reduce the amount and size of sediment moving into the shells when the valves are open 3 of 10 A thick/heavy shell To provide stability on the substrate/Protection 4 of 10 Median fold or sulcus To seperate currents of water entering and leaving the animal/Prevent mixing of fresh water and waste 5 of 10 Extension of the valves to form 'wings' To provide a large surface area to prevent sinking into the sediment 6 of 10 Smooth or weakly ribbed valves No need to be robust in quiet conditions 7 of 10 No pedicle opening Pedicle not needed for attachment 8 of 10 Flat valves with a large resting area To provide a large surface area to prevent sinking into the sediment 9 of 10 One margin of the shell upturned away from sediment To ensure that some part of the shell remains out of the sediment for feeding 10 of 10
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