The correct answer is <span>C. You cannot view live specimens because the necessary preparation kills cells. </span>
The answer is pretty self-explanatory. Unlike it, regular microscopes can view living creatures such as bacteria or similar.
Not sure if there is enough information but here goes:
It is definitely:
not A: The question does not state that pollution affected the other populations so you can't assume that.
not B: a decrease in competition would lead to an INCREASE in numbers, not decrease.
maybe D, but probably not: this answer would mean that the different fish populations are not likely to affect each other; in a stable ecosystem that is unlikely.
best answer C: decreased competition for resources would likely increase the availability for other organisms in the ecosystem.
Hope this helps!
Factories, cars and cigoretes.
All of these things are polluting the air cuasing it to heat up more which is cuasing global warming
What term describes a species whose removal would affect many other species, both directly and indirectly: keystone species