Which statement about genetic mutations is false?
A) Genetic mutations are always harmful.
B) Genetic mutations can be caused by ultraviolet light.
C) Genetic mutations in eggs or sperm may be particularly significant because they can be passed to offspring, where they will affect every cell in the offspring's body.
D) Genetic mutations are the ultimate source of all genetic variation, and so they provide the raw materials for evolution and natural selection.
A
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In which geologic setting is the most widespread occurrence of hydrothermal metamorphism found?
A) Subduction zones between oceanic and continental plates B) Along the axis of a mid-ocean ridge system C) Along transform plate boundaries D) Where mantle plumes interact with the bottom of continental plates
Which component of the earth system relates to the solid earth?
A. Exosphere B. Atmosphere C. Hydrosphere D. Biosphere E. Geosphere
If a parcel of air is capable of holding 36 grams per cubic meter but it only contains 9 grams per cubic meter, then its relative humidity would be _____ percent
a. 4 b. 9 c. 25 d. 36
Many hill-slope masses are weak due to preexisting geologic conditions such as ________.
A. structures within the rocks, such as fractures, ancient faults, and thin clay seams B. ancient slide surfaces C. rock layering dipping less than topographic slopes D. All of these choices are correct.