In many instances, one can build a GIS model that is either vector-based or raster-based. What general guidelines should one use in deciding which type of model to build?
What will be an ideal response?
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With a sketch, show why the setting sun often appears red to an observer on the ground. Why does the sun appear white at noon and red at sunrise and sunset?
What will be an ideal response?
What were the consequences of ice-age climate for the parts of the continental U.S. not covered in ice during the last ice age?
What will be an ideal response?
Which of the following correctly describes the interactions between antigens, class I MHC molecules and T cells?
A) Antigens bound to class I MHC molecules and interact with helper T cells B) Antigens bound to class I MHC molecules and interact with killer T cells C) both a and b D) neither a nor b
What type of vegetation would you find in a steppe region?
a. hardwood forest b. selva c. short grasses d. no vegetation at all e. jungle