While packing equipment for a field study, dr.
mokembe was trying to determine if he needed to
include both a dissecting and a compound
microscope. in which case would a scientist choose
to use a dissecting microscope rather than a
compound microscope?

The type of object to be observed determines whether dissecting microscope or compound microscope should be used.

Explanation:

A dissecting microscope is usually used to observe the surface features of a specimen and compound microscope is used for an in-depth observation of the specimen.

The magnification of dissecting microscope is less than the magnification of compound microscope but dissecting microscope gives a three dimensional image of the specimen. Another special feature of dissecting microscope is its long working distance.

Dissecting microscope uses the reflected light and thus preparation of specimen is usually not required. These features and its long working distance makes dissecting microscope an excellent tool in forensic and scientific applications.  

Compound microscope can be used in situations when a high magnification is required. Looking through the specimen is possible by the use of compound microscope.  

Thus the type of specimen and in how much detail it should be examined determines the type of microscope chosen.

the form of energy changes and the total energy increases0l

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."