Answer:
The correct answer is option C) "More than one variable is being tested".
Explanation:
One of the basis of scientific experimentation is to test one variable at the time in order to make sure that the response that is being obtained is the result of that variable and not another one that is not taking into account. In this case, the student is making the mistake of assessing two variables at the same time: the use of detergent and placing the plant in the sun or in the shade. At the end of the experiment the student will not know if the response is the effect of the detergent, the exposure to the sun or a combination of both.
Well, in the U.S textbooks, we use a system of 6 kingoms while in other textbooks like Great Britain, they have 5. (Britain isn't the only place with 5)
Missing options:
A) the formation of recombinant DNA
B) the synthesis of a different polypeptide
C) crossing-over
D) polyploidy
Answer:
B) the synthesis of a different polypeptide
Explanation:
The statement highlights a change in the codon sequence from UCG to UGC. If we look at the table of amino acids, we would realize that UCG encodes for "<u>Serine</u>" whereas UGC encodes for "Cysteine" amino acids. This single change in DNA sequence is known is <u>mutation</u> or <u>single nucleotide polymorphism (SNP)</u>. Finally, the change in amino acid will result in the synthesis of a different polypeptide which contians a different amino acids. See figure attached for codon table.
When a cell undergoes binary fision, the chromossomes (the genomes) get divided in half and are passed to the two daughter cells.
→ The image below shows the process in a very detailed way.
Hope it helped,
BioTeacher101