Cells can only come from pre-existing cells
CELL THEORY
1. cells are the basic units of structure
2. all living organisms contain one or more cells
3. all cells come from preexisting cells
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A blood test would be useful to see any toxins intake throughout the blood stream.
Answer:
Option (D).
Explanation:
Different DNA polymerase are present in eukaryotes that are necessary for the replication of the DNA. DNA polymerase composed of four subunits : POLD2, POLD1, POLD4, and POLD3.
The DNA polymerase delta are involved in the DNA synthesis. This polymerase has both the exonuclease activity and proofreading ability of newly synthesized DNA.
Thus, the correct answer is option (d).