20 percent available at the highest tropic level. There is less at the top of the food chain because it has ate things from possibly all areas of the food chain and each level is consuming from lower parts of the chain than it. So with the entire food chain eating on what the top eats there is gonna be less for the top
Cellular compartment. Cellular compartments in cell biology comprise all of the closed parts within the cytosol of a eukaryotic cell, usually surrounded by a single or double lipid layer membrane. These compartments are often, but not always, defined as membrane enclosed regions.
Intracellular- Potassium and hydrogen phosphate
Extra cellular-Sodium and chloride
Echinoderms are not arthropods like the others. Starfish and sand dollars are echinoderms.
the choices are Mice live longer lives in the laboratory than in their natural habitats. The lifespan of a mouse is longer if it is a female. or
Mice that eat small amounts of food live longer than those that eat large amounts of food.
