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Question

Which of the following combination of characters is true for slime moulds?

A
Parasitic, plasmodium with true walls, spores dispersed by air currents.
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B
Saprophytic, plasmodium without walls, spores dispersed by water.
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C
Parasitic, plasmodium without walls, spores dispersed by water.
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D
Saprophytic, plasmodium without walls, spores dispersed by air currents.
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Solution

The correct option is D Saprophytic, plasmodium without walls, spores dispersed by air currents.
The plasmodium is a diploid structure. Plasmodium is a naked, multinucleate, motile mass of protoplasm; no cell wall around it. Spores of slime moulds are small (4-20 m) and are easily picked up by air currents, arthropods and other animals. On germination a spore produces one or four myxamoebae or flagellate cells known as swarm cells. Slime moulds are saprophytes, obtaining nutrients by absorbing dead organic matter.

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