Which of the following biological activities best demonstrates water's adhesive properties? Choose 1
A leaf's cuticle, or waxy over coating, repels water droplets.
B
Water travels through vascular tissue from the roots to the leaves of a plant, moving against
the force of gravity.
Water evaporates from leaves through openings called stomata, which open and close in
response to environmental conditions.
D
The vacuole of a plant cell swells as water enters and dilutes its contents.

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

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.

How does science influence the decisions made about social, economic, and political issues?