| A | B |
|---|
| chloroplast | contains thykaloid membrane, stroma, and grana, contains chlorophyll |
| xylem | supplies H2O from roots to stem to leaf of a plant |
| stomata | allows CO2 to enter and O2 to leave |
| guard cells | regulate the amount of CO2 entering plant |
| phloem | carries glucose to plant parts |
| light reactions | the series of changes that occurs only in the prescence of light, converting light energy into chemical energy |
| photosystem | clusters of chlorophyll and carotenoids |
| Calvin Cycle | aka dark reactions |
| overall equation for photosynthesis | 6 CO2 + 6 H2O + light energy > C6H12O6 + 6 02 |
| wavelength | a measure of radiant energy calculated by the distance from one wave crest to the next |
| visible spectrum | range of colors that make up white light |
| why objects appear colored... | molecules in colored objects absorb some wavelengths of light and reflect others |
| absorption spectrum | characteristic pattern of wavelengths, or colors, of light absorbed by a particular pigment |
| carotenoids | pigment molecules-- usually yellow, orange, and red -- that interact with chlorophylls to absorb light energy needed in photosynthesis |
| photons | particles of light, each carrying a definite amount of energy |
| pigment | a substance that absorbs light of particular wavelengths |
| chlorophylls | pigments that absorb most violet and blue and much of red and orange wavelengths (reflection of green and yellow gives plants color) |
