In an experiment, the group that receives the “special” treatment is called the group.

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

Why do we perceive objects as retaining their brightness under different lighting levels?

Number and variety of living organism; includes genetic, species, and ecological types