Step 1: Understanding the magnification formula.
The total magnification \( M_{\text{total}} \) of a compound microscope is the product of the objective magnification and the eyepiece magnification:
\[
M_{\text{total}} = M_{\text{objective}} \times M_{\text{eyepiece}}.
\]
Step 2: Substituting the known values.
We are given that \( M_{\text{total}} = 100 \) and \( M_{\text{objective}} = 10 \).
\[
100 = 10 \times M_{\text{eyepiece}},
\]
\[
M_{\text{eyepiece}} = 10.
\]
Step 3: Conclusion.
The angular magnification of the eyepiece should be \( \boxed{10} \).
Identify the taxa that constitute a paraphyletic group in the given phylogenetic tree.
The vector, shown in the figure, has promoter and RBS sequences in the 300 bp region between the restriction sites for enzymes X and Y. There are no other sites for X and Y in the vector. The promoter is directed towards the Y site. The insert containing only an ORF provides 3 fragments after digestion with both enzymes X and Y. The ORF is cloned in the correct orientation in the vector using the single restriction enzyme Y. The size of the largest fragment of the recombinant plasmid expressing the ORF upon digestion with enzyme X is ........... bp. (answer in integer) 