Overview of aquatic systems
What will be an ideal response?
-oceans: 96.1%
-polar ice and groundwater: 3.7%
-surface freshwaters 8soil water, lakes, streams, rivers, etc.): 0.2%
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Which gas is increasing in the atmosphere and threatening the world with the greenhouse effect?
a. carbon dioxide b. carbon monoxide c. ozone d. fluorocarbon e. oxygen
Use the concept of coevolution to explain the abundance of large mammals in Africa after the rise of
humans but their rapid demise in the Americas after the arrival of humans. What will be an ideal response?
You are out cycling and start to climb a hill. As you crest the hill, just before cycling down, what energy have you
stored? a. kinetic energy b. thermal energy c. chemical energy d. electrical energy e. potential energy
Which of the following features is unique to the Class Aves?
a) hair b) notochord c) wings d) shelled eggs e) barbules