Key Terms
- airtight seal
- completely sealed so that no air can get in or out of it
- calibrated pipette
- to prevent inaccuracies in order to attain better results, performance, and longevity of the pipette itself
- evaporate
- change of water from liquid to gaseous state, often removing heat from a wet surface
- fluorescent light
- a usually tubular electric lamp having a coating of fluorescent material on its inner surface and containing mercury vapor whose bombardment by electrons from the cathode provides ultraviolet light which causes the material to emit visible light
- guard cells
- each of a pair of curved cells that surround a stoma, becoming larger or smaller according to the pressure within the cells
- plant cutting
- a section of plant such as a modified stem, leaf, or root used for vegetative propagation that forms either adventitious shoots, adventitious roots (stem and single node cuttings), or both (root and leaf)
- photometer
- an instrument for measuring the intensity of light
- stomata
- any of the minute pores in the epidermis of the leaf or stem of a plant, forming a slit of variable width which allows movement of gases in and out of the intercellular spaces
- transpiration
- (of a plant or leaf) the exhalation of water vapor through the stomata
