D) six because amino acids are coded by three bases each which = a codon which codes for an amino acid
Since hereditarily they ought to be indistinguishable so any contrasts between them will be caused by their condition. Since indistinguishable twins create from a solitary prepared egg, they have a similar genome. So any contrasts between twins are because of their surroundings, not hereditary qualities. Late examinations have demonstrated that numerous naturally actuated contrasts are reflected in the epigenome.
The answer is most likely C. When a sedimentary rock is deposited on top of an eroded non-sedimentary rock.
Answer:
The correct answer will be option-A
Explanation:
A scientific experiment is designed in a way that it tests the predicted hypothesis and so contains the three different types of variables namely: independent (can be modified), dependent (to be studied) and the control (kept constant and unchanged).
In the given question, since the scientists studied the effect of nitrate and phosphate in which he provided the plant samples with nitrate and phosphate but he missed the control sample which should lack the variable to be tested that is nitrate and phosphate. This control variable helps the scientist to study the relationship between other samples.
Thus, option-A is the correct answer.