Suppose that there are 500 units of energy available at the producer level of the energy pyramid. approximately how many units of energy are available to the first level consumer?

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?