Question

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why are seeds that are dispersed with water covered with hard covering? Short answer ​

Answer 1

Answer:

Because they need to withstand many physical environmental conditions.

Explanation:

Seeds that are dispersed by water need to withstand many physical factors including temperature, humidity, salinity, and so on. They must not be damaged by water or aquatic organism. These seeds usually take a long time to reach a landmass and grow into a plant or tree. Until then it needs protection and hence has a thick outer covering.