Salt crystal growth causes weathering because ____
a. chemical reactions with salt weaken some minerals
b. organisms readily grow on salt crystals
c. salt oxidizes readily
d. salt expands when it freezes
e. growing salt crystals can wedge apart cracks
e
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Discuss the development of mammals of the order Carnivora. What will be an ideal response?
Groups of organisms with low biotic potential, such as gray whales, ________
A) are r-selected B) are K-selected C) show the initial stages of the extinction process D) are not subject to density-dependent limiting factors E) have escaped from the processes of natural selection and adaptation
What part should subsidies play, if any, in the effort to reach sustainable fishing?
What will be an ideal response?
Scientists are now able to produce desirable traits in some organisms by adding, deleting, or changing segments of its DNA. This process is known as ____.
A. genetic modification B. genetic engineering C. genetic drift D. mutation E. speciation