The observation that chloroplasts and mitochondria each contain their own dna and synthesize some of the proteins that function in these organelles suggests that chloroplasts and mitochondria must divide each time the cell containing them divides are produced by the nucleus of the cell contain three sets of membranes are part of the endomembrane system

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u