To study osmosis, a student placed a thin potato slice in a salt solution. the slice became soft and shriveled. then, he placed the shriveled slice in water. the slice regained its original shape. based on the observations, which of these statements is correct? a) the slice regained its shape because salt moved into the potato. b) the potato slice shriveled because water moved from the salt solution into the slice. c) the potato slice shriveled because water moved out of the slice into the salt solution. eliminate d) the slice regained its shape because the concentration of salt inside and outside the slice became equal.

Apart of an ecosystem that can restrict the growth of a population is referred to as

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?