What is a limitation of using electron microscopes to view specimens?
a)electron microscopes cannot view living things.
b) electron microscopes cannot view internal parts of specimens,
c) the resolution of electron microscopes is weak and cannot view details of specimens.
d) you cannot view transparent specimens because of the microscope's low resolution.

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water