what term defines the movement of materials along the concentration gradient through protein channels

What would happen if the krill were removed from the food web

50 points! which of the following is an inference? a burning candle is extinguished when it is covered with a jar. the candle burns longer than expected in a jar that has a plant in it. a plant lives longer than expected in a jar that has a burning candle. there is more oxygen in the jar because there is a plant in it.

In which part of the body is a ball-and-socket joint found?