The problem of acid rain can be alleviated by a reduction in the ________.
a. burning of fossil fuels
b. consumption of nuclear energy
c. heating of acids
d. emission of carbon dioxide
Question 2
Which of the following is a true statement about the hydrologic cycle?
a. In a single pass through the hydrologic cycle, water is not always fully suitable for reuse.
b. There usually is more than one mechanism by which water is purified in the hydrologic cycle.
c. The hydrologic cycle describes the life cycle of marine wildlife.
d. The cleansing ability of the hydrologic cycle is not impacted by population and technology.
A closer look at the citric acid cycle
Osteoporosis. (a) A section through normal spongy bone. (b) A section through a bone with osteoporos
Rain Frog
Citric Acid Cycle
How to solve a distance, time, speed problem using linear algebra
Cast of a Fossil Dunkleosteus, with a human to illustrate scale