C It controls what is allowed to enter or leave the cell.
<span>A scientific theory is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation.</span>
Answer:
formed of ice, rock, and dust
develop tails near the Sun
Explanation:
Comet is a smaller celestial body which is mainly composed of ice and dust.
The other components of this comet are rocks and gas.
When any comet approaches a sun it can deliver a tail of dust or gas.
hope this will help you
Answer:
As rust or iron oxide absorbs moisture and becomes a poor conductor, its electrical conductivity decreases.
The width of the cloud is : 384 m
<u>Given data :</u>
Cloud altitude = 2200 m
Temperature = 10°
<h3>
</h3><h3>Determine how wide the cloud is </h3>
applying the equation below
I = d
where : I = linear size , d = 2200 m , 
therefore :
I = 2200 ( 10 / 57.3 )
= 383.94 m
≈ 384 m
Hence we can conclude that the width of the cloud is : 384 m
Learn more about linear size : brainly.com/question/1048150