Explanation:
In all living system we can always find basic elements carbon, oxygen, nitrogen and hydrogen, carbon is the basic building unit contained in living matter. The percentage of carbon in the mass of living matter is 19.0% oxygen and hydrogen are present in almost all organic compound which creates living organisms.
2 seems like the best answer
Answer:
Ratio = 
Explanation:
Side of a cube, a = 20 µm
The surface area of a cube, A = 6a² (a is side of the cube)
The volume of a cube, V = a³
The ratio of the surface to volume ratio of the cell will be given by :
So, the ratio of the surface to volume ratio of the cell .
Pleiotropic<span>: Producing or having multiple effects from a single gene. For example, the Marfan gene is </span>pleiotropic<span>, potentially causing such diverse effects as long fingers and toes (arachnodactyly), dislocation of the lens of the eye, and dissecting aneurysm of the aorta.
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