The narrow stalk supporting the anther is the filament . Any one of a number of polysaccharides produced by plants and other photosynthetic organisms as a means of storing excess carbohydrate. For example the white part of a potato consists of grains of starch stored in a specialized ground tissue. When the energy in the starch is needed by the plant, it is broken down to sucrose for transport and when the sucrose reaches the cells where it is needed it is converted to glucose and or fructose. A class of lipids characterized by a four carbon ring structure.
Cholesterol is an important component in cell membranes, increasing the flexibility of the membrane.
The part of the pistil that receives the pollen grain. In plants, the small pores located usually on the lower surface of leaves through which gas exchange and transpiration takes place. The region inside the chloroplast, outside the grana , where the Calvin-Benson cycle of photosynthesis takes place. The elongated part of the pistil just below the stigma. In biochemistry, the substances being acted up by an enzyme.