Some bacteria have , or whiplike tails that spin to propel them forward.

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

Darwin’s hypothesis about how life changes over time is now called?

What best explains why atp is regarded as a renewable resource within the cell