Nucleic acids / aka nucleotides
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.
About the geologic time scale divisions
The geologic history of the Earth is broken up into hierarchical chunks of time. From largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.
The digestive system is greatly affected by the irritation in the small intestine that occurs because of gallbladder disease.
C applies as the kidney must excrete salt in order to get rid of excess water. (Water chases salt) if there is too much salt in the body the urine will be much more concentrated then if the body had too much water. Glucose may kbly be excreted if there are problems with the kidney- some diabetics pee out glucose. D applies to some degree- salt will still be excreted but in very dilute amounts- as the water must chase something in order to be excreted.
