9. Which of the following contributes to the resting potential of a neurone? I. Ion channels II. Differences in concentration of ions across the membrane III. Sodium-potassium pump IV. Graded potentials

Were is the question

An ecosystem is in a certain area and includes living and non living plus there is weather conditions and a biome is a large amount of area with similar climate.so ecosystem is based on weather and biome is based on the average climate 

Succulents are the type of plant. like a cactus.