In animal cells, which structure is thought to produce the spindle fibers that separate the sister chromatids during anaphase

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology

What are the pros and cons of quadrat sampling?