Why does air at 75% relative humidity and 30°c make your skin feel stickier than air at 75% relative humidity at 10°c?

warm air rises while cold air falls.
the warmer air contains less water vapor per unit of volume.
the warmer air contains more water vapor per unit of volume.
moist air has lower density than dry air does.

How do chloroplasts set plants apart from other living things

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above