Isotopes
The answer has to be 20 characters long so this is irrelevant.
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.
glycolysis in the cytoplasm is similar in both fermentation and cellular respiration.
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Transport
The protein is working to transport substances across the membrane.
