Question

Thomas gave a presentation on DNA. During his presentation, he used a diagram as a model for DNA.

Thomas used a model because
A.
DNA's structure is unknown so he's presenting a hypothesis.
B.
DNA is too small for its structure to be seen with the unaided eye.
C.
DNA's structure changes too quickly to ever be viewed.
D.
DNA is too large to fit into the classroom.

Answer 1

Answer: B

Explanation: None of the other options make much sense in this case. We do know the structure of DNA, the structure doesn't change, and it is extremely minuscule, so the last option doesn't make sense either.

Answer 2

B.

DNA is too small to be seen without a microscope.