Explain why an energy pyramid in any ecosystem typically is limited to four or five levels only.

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline.which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

All other things being equal the size of a population will decrease if