Explanation:
It is expected that the rocks in a stream will eventually be transformed into a sediment and deposited in the same basin or carried away.
- As the rock body inside the water begins to absorb water, it will eventually undergo chemical weathering.
- Rock chips from other bed-loads carried by the flowing stream will cause the breaking down of the rock mass in the stream mechanically.
- The above processes are classified as weathering.
The stream can erode its own bed causing the washing away of the weathered rock materials. Stream erosion occurs when weathered materials are washed away either in solution or as bed load moving on the base of the stream.
During transportation, the materials are carried away to nearby basins where the sediments are deposited under gravity.
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Answer:
The population of fish with pelvic spines that arrived in the lake at time B evolved a reduced pelvis over time (beginning at time C).
(Having a reduced pelvis must have been advantageous for this ancient stickleback population, just as it is for many current freshwater stickleback populations.)
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Answer:
A renewable resource is a natural material that is replenished in the environment through natural processes. These materials can be used indefinitely, as long as they are not consumed at a rate faster than they can be restored.
