1. explore how the human system can be modified into a sustainable ecosystem in balance with other natural ecosystems without losing the benefit of modern civilization. in other words can we live sustainable without losing our modern standard of living.

Liquid water turns into water vapor at which step in the water cycle? a. precipitation o b. water run off c. evaporation d. condensation

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.