HIV, the retrovirus which causes AIDS, does which of the following?
A) uses reverse transcriptase to synthesize DNA
B) uses RNA replicase replicate it own RNA
C) both a and b
D) neither a nor b
A
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If you mix a typical aluminum ion (Al, atomic no. = 13) with a typical oxygen ion (O, atomic no. = 8), what compound is formed?
A. Al2O2 B. Al3O C. Al3O2 D. Al13O8 E. Al2O3
The process by which loose sand from a beach or desert is converted into a solid rock called sandstone is an example of ____.
a. lava b. evaporite c. lithification d. mafic e. metamorphism
Where are the Ediacaran fauna found? What will be an ideal response?
How does deforestation by fire or human activity contribute to mass wasting?
a. It allows the wind to blow across the slopes, imparting a stress that triggers landslides. b. It allows farming activity that exposes soil to erosion and mass wasting. c. It kills tree roots that help hold the slopes in place, allowing mass movement. d. It allows excess rainfall runoff to erode the landscape, triggering mass wasting.