As trees along a heavily shaded stream are cut down for farm land, the Environmental Protection Agency (EPA) must measure change
s 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.
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.
Plants and animals depend upon each other as mutual interdependence is must for their survival. Plants provide shelter for animals and they make oxygen for the animals to live. When animals die they decompose and become natural fertilizer plants. Plants depend on animals for nutrients, pollination and seed dispersal.
In order to survive the winter, monarch butterflies "migrate to warmer areas".
<u>Option: B</u>
<u>Explanation:</u>
The survival for Monarch butterflies is not possible in any of the United States 'cold winters, therefore they are needed to migrate south and west every autumn to avoid the cold temperatures.
This species migration usually begins around every year in October, but may begin quicker if the weather turns cold earlier than that.
Thus they spend their winter hibernation all year round in Mexico and some areas of Southern California where the temperature is warmer.
If the monarch stays in the Eastern states, typically east of the Rocky Mountains, then they will migrate to Mexico and hibernate in <em>oyamel fir</em> trees.
