Question

As trees along a heavily shaded stream are cut down for farm land, the Environmental Protection Agency (EPA) must measure changes to the local stream habitat. Water samples from the stream are collected over time. The microorganisms are counted and classified in order to track changes.
EPA researchers MOST LIKELY used a __________ to view the microorganisms in the stream water samples.

A)
light microscope


B)
magnifying glass


C)
computer simulation


D)
scanning electron microscope

Answer 1

Answer:

A) light microscope

Explanation:The EPA researchers would use a light microscope to count and classify the microorganisms present in the stream water samples. A magnifying glass would not be strong enough; a scanning electron microscope would be too powerful. A computer simulation does not analyze real data.

Answer 2

Answer: A. light microscope

Explanation: usatestprep approved