What is the key mechanism maintaining genetic variation in most populations?
A) asexual reproduction
B) biotechnology
C) inbreeding
D) mutation
E) sexual reproduction
E
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The treelike drainage pattern shown below from Yemen is known as _____ .
a. Trellis b. Radial c. Dendritic d. Alluvial fan e. None of the above
Which of the following might indicate that slopes adjacent to this landslide might fail?
A) They have the same steepness as the slope that failed.
B) They appear to have a similar geology setting.
C) One part of the slope has already failed.
D) All of these are correct.
What process involves the radiation of internal heat to the surface?
A) Convection B) Conduction C) Radioactive decay D) Combustion
Tropical oceans are generally characterized by low net primary productivity. What are three environments that are exceptions to this and what factors contribute to their higher productivity?
What will be an ideal response?