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.
where it breaks down complex molecules into much easy ones
Plant cells have a chloroplast and animal cells do not. :)
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A. Cell membrane
the plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment.
proteins contain nitrogen
