The is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.1. plasma membrane2. nucleoid region3. ribosome4. pili5. cell wall

The answer would be the cell wall (5)

Hope this helped!

~Just a girl in love with Shawn Mendes

a. to encourage apoptosis

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