Which of the following could be a physical hazard? a. shigella bacteria b. plastic packaging c. all-purpose cleaner d. mold

Study this image. which statements best describe the rock shown? check all that apply. the grains of this rock are jagged. this rock has several coarse grains. the grains in this rock are very large. this rock has a non-banded pattern. the color of this rock is determined by its texture.

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

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture