Shades of blue show climate divisions that had monthly average temperatures below 50Â°F. The darker the shade of blue, the lower the average temperature. Climate divisions shown in shades of orange and red had average temperatures above 50Â°F. The darker the shade of orange or red, the higher the average temperature.
A stroma is the connective, part of a cell, organ or tissue. The  function of a stroma is to hold the cell, organ, or tissue together  and help it maintain form. Edit.
Functions of Chloroplasts. Chloroplasts are membrane-bound plastids containing chlorophyll, thylakoids, grana, and their own set of DNA molecules dispersed in the stroma. Each component of a chloroplast has a unique role in photosynthesis and photorespiration.hloroplasts -- the kitchens of plant cells -- are the key organelles for the nourishment of plants and other autotrophs. They are also the sites for nitrogen fixation, the reactions of which are interconnected with the processes of photosynthesis and photorespiration, and play a protective role in plant cells.