Answer:
It replaces damaged cells. It creates a barrier over the bruise or wound. It releases a substance that heals the bruise or wound. It stops blood flow in the area of the bruise or wound.
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Answer:
Gravity, Electromagnetic force, Weak Interaction, Strong Interaction
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In secondary succession, the pioneer species are plants that are adapted to exploit disturbances rather than bare rock. They typically include plants such as grasses, birch trees, and fireweed. Organic matter from the pioneer species improves the soil so other trees and plants can move into the area.