The six icons shown here are part of a model for understanding global change. Icons represent population growth, agricultural activities, deforestation and reforestation, habitat loss and restoration, invasive species, and urbanization.

What does the set of icons represent in the model?

A. human inputs to the global energy budget
B. human causes of changes to global systems
C. human activities that are independent of global change
D. the effects on human society of changes to global systems

a. possible errors

d. new questions

explanation:

predictions and planning happen before. a summery comes after. errors you get after investigation and new questions propose what you can look for in the future.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.