1. Solids have a definite volume and a definite shape Group of answer choices

True

False

2. A mixture IS a pure substance
Group of answer choices

True

False

Select the correct answer.which scenario describes unethical lab behavior? o a. danny stores the chemicals required for his experiment in flasks and beakers.b.anna publishes the results of her experiment on the growth rate of saplings.c.jason repeatedly runs an experiment until he gets the results he desires.d. mia records her observations of an experiment precisely and accurately.

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

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement