Difficult or painful digestion-dyspepsia
Answer:
When wolves were removed from the habitat, the elk thrived, causing a population increase. more elk means an increase in the need for food. The leaves of an aspen tree make good food for elk causing over-grazing and soon, the "aspen trees will be eaten out."
Explanation:
Multiple alleles. As different blood types can be determined by 2 different alleles
The large, slow brain waves associated with deep sleep. Rapid eye movement sleep; a recurring sleep stage during which vivid dreams commonly occur.
