A sequence of organisms, each of which serves as a source of nutrients or energy for the next, is called a(n) .

Why do you think the puppy litter was all dark-haired?

Antoine manages a number of apartment buildings that use natural gas for heating, cooking, and laundry. the scatter plot shows the correlation between the outside air temperature and antoine's natural gas bill. which type of correlation does the plot illustrate?

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?