What is the definition of spiral density wave?

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

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist