Differences between the carbon cycle and food webs

When should a bar graph be used? a. when there is no independent variable. b. when the independent variable is continuous and does not show a relationship to the dependent variable. c. when the independent variable is continuous and shows a causal link to the dependent variable. d. when the independent variable is composed of categories and does not show a relationship.

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

The deserts of the sahara and australia are associated with