Biology i will give the first one
if dna from a cell is placed in a test tube containing the enzyme dna polymerase and nucleotides, the result is new copies of the original dna. this evidence was used to understand dna replication (dna passing information from one generation to the next). write an explanation detailing why this clue represents solid data and is not an opinion or an inference.

DNA being placed with DNA polymerase and nucleotides and resulting in new copies is not an opinion or inference because the fact is, new more DNA was found in the test tube after adding the enzymes and nucleotides than before the addition. DNA sequencing of the new copies would have shown that the sequences of the new DNA are identical to the original DNA that was first placed in the test tube. Also, other experiments would have shown that adding other different kinds of molecules or enzymes does not, in fact, produce new strands of the original DNA, nor should it be able replicate the DNA at all. 

Spherical shaped cell might increase the surface area and decrease the volume.

The answer is option a