Which heats up and cools down the fastest? a) landb) water

Why do cells appear different in distilled water than they do in 10% salt water?

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a. the mitochondria b. the nucleus c. the vacuoles d. the endoplasmic reticulum

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?