POSSIBLE POINTS: 5 The sodium-potassium pump is involved in active transport that moves 3 sodium ions from the cell for every 2 potassium ions it moves into the cell. Which of these best explains why energy is needed for active transport? lons are being moved against the concentration gradient. lons are attached to small particles. lons are trapped inside the cell membrane. lons are negatively charged.

Melissa lives in a town called greendale. she discovers that when she lights a match and holds it near her kitchen faucet, the little flame grows into a larger fire. melissa is surprised because she thought the water would extinguish the flame rather than ignite it further. her mother tells her that the water might be contaminated with dissolved methane, a primary component in natural gas. melissa investigates the matter and finds that cases of methane contamination started shortly after a company began fracking for natural gas in the area. based on this information, which three statements are plausible consequences of fracking in greendale?

What happens whenever a net force acts on an object

Based on anatomical similarities, to which modern animal is dr. digger’s creature most closely related?