I think it is called crust which is outermost layer of planet or satellite.
D. It must go from areas of low concentration to high, and this is only achievable with the use of energy, ATP!
Freshwater, ocean water, and terristrial.
There are three broad categories of ecosystems based on their general environment, as those that were mentioned above. Within these broad categories are individual ecosystem types based on the organisms present and the type of environmental habitat.
Yes a small cell has a larger surface area
Hypoxia is inadequate oxygen delivery to body tissues. The form of hypoxia that reflects poor oxygen delivery resulting from too few Rbcs of from Rbcs that contain abnormal or too little hemoglobin is the Anemic hypoxia. Hemoglobin plays a substantial role in carrying oxygen through out the body, and when it is deficient, anemia can result, causing anaemic hypoxia' if tissue perfusion is decreased. Iron deficiency is the most common cause of anemia.
