Explain why a rainforest is a more stable ecosystem than cultivated land, such as
a wheat field

Always use significant figure rules. remember that these rules apply to all numbers that are measurements. a car travels 6 miles north, 3 miles east, and then 2 miles south. what is the distance traveled? a.7 b.11

When water freezes, it . contracts expands

In what for do plants utilize nitrogen? why do they need nitrogen?