A surface low pressure area with a deep upper-level trough to the west will tend to move toward the
a. northwest.
b. northeast.
c. southwest.
d. southeast.
e. south.
ANSWER: b
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What proportion of food products sold on U.S. supermarket shelves contains some form of genetically engineered crop?
a. 20% b. 30% c. 50% d. 60% e. 70%
When basaltic lava cools under water, it forms _______
a) pillow basalts b) flood basalts c) rift basalts d) sheet basalts e) regional basalts
The area between lowest tide level and the highest elevation on land affected by storms is called:
a. Shore b. Coast c. Coastline d. Embayment
Many wasps and bees have an hourglass-shaped body with prominent striping. Most also have a sting that they use for defense and/or for capturing prey
Tropical entomologists have long known that there are many other species of insects that lack a sting, such as flies, moths and beetles, that are remarkable mimics of bees and wasps. The mimics probably arose through A) interbreeding with wasps and bees in the remote past. B) developing a strong desire to survive attacks by predators. C) long and slow modification through natural selection. D) interspecific competition with bees and wasps.