Answer:
DNA is the recipe for how to build your body's proteins and mRNA is an index card it copies the DNA but doesn't have to stay in the nucleus. (1st option)
Explanation:
DNA carries genetic instructions for developing, growing and reproducing all known organisms and many viruses. mRNA, on the other hand, collects the DNA's instruction to the cells' protein-making part.
Answer:
The innermost layer of the atmosphere is TROPOSPHERE.
Explanation:
Atmosphere - The gaseous surroundings of earth is known as atmosphere. On the basis of variations in temperature, atmosphere has several layers as follows-
<u><em>Troposphere</em></u>- <em><u>It is the innermost layer of the earth. extending 17 km above sea level at the equator and about 7 km above the earth's poles</u></em>.Weather phenomenon occurs in this layer.It is known as troposphere because of vigorous air current.
<u><em>Stratosphere- </em></u>It is the second layer above troposphere.It extends approx 50 km above the earth surface.Ozone is also found in this layer. ozone plays very important role in maintaining thermal balance.
<u><em>Mesosphere-</em></u> It is the third layer of earth surface.Extending approx 50 to 85 km above the earth.Here temperature remains low.And at the top of this layer i.e, mesopause has the coldest temperature.
<u><em>Thermospher-</em></u> Temperature in this region is slightly high because of absorption of solar light.
<u><em>Exosphere-</em></u> It is the outer most layer of earth. Any particle or object in this layer if moving very fast can escape to the space. The <u>exopause</u> boundary of exosphere is approx 250-500 km above the surface. This is the transition layer between earth atmosphere and space
