Answer:
The correct answer is "190 um".
Explanation:
The given values are:
Field of view,
= 380 um
Percentage,
= 50%
Now,
The size of flea occupied will be:
= 
= 
= 
Correct answer: C) Concentration gradient
The process of movement of a particle in a solution from the region of higher concentration to the region of lower concentration across a membrane is called as concentration gradient.
For example: If we drop a few drop of dye in a glass of water, it will diffuse along a concentration gradient, i.e, the region where dye is found in highest concentration to the region where it is in lower concentration.
It will occur until the concentration of dye become uniform in all the direction in the glass of water.
A plant because only plant cells have a cell wall.
Answer: D. A forest fire
Disturbance is an event of extreme environmental stress that
happens in a short period of time and can largely affect the ecosystem in the
area affected. Disturbances may either be due to natural phenomena or man-made.
True I hope this helps you with your test
