What choice best describes how temperature changes in the atmosphere as altitude increases? A: The temperature increases with altitude in all layers.

B: The temperature decreases with altitude in the troposphere and mesosphere, but increases with altitude in the stratosphere and thermosphere.

C: The temperature decreases with altitude in all layers.

D: The temperature increases with altitude in the troposphere and mesosphere, but decreases with altitude in the stratosphere and thermosphere.

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

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.

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england