Please help! Question

A (physical property)

Explanation:

It says they both had clear liquids in each cup and since ice floats on water the only option that makes sense is A. There were no chemical, magnetic, or temperature tests made.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.