Fruit trees are particularly vulnerable to cold weather ____
a. when they are fruit-bearing
b. when they are bare
c. right after fruit have been picked
d. when they are blossoming
e. when the first leaves show up
ANSWER: d
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The predominant source of food in abyssal plains is ________.
A. photosynthetic biomass produced on the seafloor B. chemosynthetic biomass produced at cold seeps C. chemosynthetic biomass produced at hot vents D. photosynthetic biomass produced at the surface E. None of these is correct.
Mineral reserves are fixed quantities that do not change unless depleted by mining.
Answer the following statement true (T) or false (F)
What are the eight most common elements found in Earth's crust, listed from most common to least common (by percent)?
a.) oxygen, silicon, aluminum, iron, calcium, magnesium, potassium, sodium b.) oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium c.) oxygen, silicon, aluminum, iron, calcium, potassium, sodium, magnesium d.) magnesium, potassium, sodium, calcium, iron, aluminum, silicon, oxygen e.) oxygen, silicon, aluminum, iron, calcium, sodium, magnesium, potassium Submit
The 1928 failure of the St. Francis Dam near Los Angeles was due to ________.
A. landslides associated with the reservoir B. presence of foliation planes in one abutment of the dam C. excessive water pressure at the base of the dam D. one abutment was built against rock that disintegrated in water E. All of the answers are correct.