What answers are true about a simple diffusion? there's more than one answer a. this transport is typical for large molecules. b. it is a form of passive transport. c. molecules travel with the concentration gradient. d. it is how oxygen and carbon dioxide travel across the membrane. e. it is how glucose travels across the cell membrane.

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide

Which feature of a human community is similar to a niche in a biological community