In the equation for the gravitational force between two objects "d" quantity must be squared.
<u>Answer:</u> Option D
<u>Explanation:</u>
The force that attracts two objects with mass is called as gravitational force. This has been explained by "Newton's Universal Law of Gravitation" which says "In this universe every single particle attract every other particle with a force which directly proportional to the product of their masses while inversely proportional to the square of the distance in between them. "
The gravitational force between any two objects with masses can be calculated by given formula:
F = G (m1 . m2 / d^2)
Here the F is gravitational force,
G is the gravitational constant = 6.67 × 10^-11
m1 and m2 are the masses of the two objects
d^2 also represented as r^2 is the distance between two objects.
The start codon is the first codon of a messenger RNA transcript translated by ribosomes. The start codon always codes for methionine in eukaryotes and modified Met in prokaryotes.
The most common start codon is AUG codon..
The start codon is often precedede by a 5 prime untranslated region i.e 5 prime UTR.
Answer:

Cell wall : Plant cells have a cellulosic cell wall, which is absent in the case of animal cells.
The plasma membrane serves as the outermost boundary for an animal cell.