How do algae help keep the balance of an aquatic ecosystem? Select all that apply. 1.by releasing oxygen
2.by providing food for consumers
3.by absorbing carbon dioxide
4. by releasing carbon dioxide

Adoctor is trying to diagnose a patient with dry skin. which of the following resources would be the most ? a magazine ad about soft skin a growth chart online articles about dry skin medical books

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?