Ions are atoms or groups of atoms that have
a. Gained or lost an electron
b. Gained or lost a proton
c. Gained or lost a neutron
d. Gained or lost either an electron or a proton
e. different numbers of protons and neutrons in the same atom
A
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Where do mountain streams get most of their load of sediment?
A) Landslides, slope failures, and erosion of the mountain sides B) Downward incision into bedrock C) Abrasion of bedrock along the bottom of the channel D) Alluvial fans
Ninety percent of the water used by Las Vegas, Nevada, comes from the Colorado River.
Answer the following statement true (T) or false (F)
How might the establishment of wildlife refuges and international treaties to protect endangered species actually increase their vulnerability and hasten their extinction?
a) By accentuating their scarcity b) By driving up their value c) By making them a “positional good” d) All of the above
What adaptation have only toothed whales developed for prey detection?
a. Ability to generate internal body heat b. Bradycardia c. Advanced gas exchange system d. Echolocation