Question

which two steps best allow a student in a classroom laboratory to see how cells placed in a hypertonic solution maintain homeostasis?
oa observe live plant cells under a microscope.
ob measure the volume of water moved by the cell.
oc observe live animal cells under a magnifying glass.
od measure the mass of a cell before and after the experiment.
oe add distilled water to the edge of the slide so it can diffuse into the cells.
of add a 0.9% solution of saltwater to the edge of the slide so it can diffuse into the cells.

Explanation:

To see how cells in a hypertonic solution maintain homeostasis, observing the cells is key (A helps with plant - cell observation). Measuring the mass change (D) can show water movement due to osmosis in hypertonic solutions as water leaves the cell causing a mass decrease. Magnifying glass is not sufficient for cell observation (C is wrong), adding distilled water makes a hypotonic environment (E is wrong), adding 0.9% saltwater is not hypertonic for most cells in this context (F is wrong), and measuring water volume moved by the cell is difficult in practice (B is less practical).

Answer:

A. Observe live plant cells under a microscope.
D. Measure the mass of a cell before and after the experiment.