A helium-filled balloon contains 0.16 mol He at 101 kPa and a temperature of 23°C. What is the volume of the gas in the balloon?

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?

Kate is studying the transformation from unicellular to multicellular organisms. which metaphor is the most appropriate to apply to the map of the timeline.