<span>the high expense; electron microscopes are costly</span>
It would be C. because the student is using different amounts of fertilizer in each container
You can check your body temperature it is useful in medical field.
Dissecting microscopes used for the observation of larger objects and u can get a magnification of less than 100x.
<span>Dissecting microscopes are most often used by plant biologists
IM NOT VERY SURE</span>