ClipArt ETC
This illustration shows oxygen escaping leaves when they are placed in water and then in sunlight.

Oxygen Release

This illustration shows oxygen escaping leaves when they are placed in water and then in sunlight.

"Diagram to show the activities going on in a palisade cell. The arrows from the chloroplasts into the cell cavity indicate movement of photosynthesized product. The thickness of the arrow shafts under "Light" indicate the relative light intensities." -Stevens, 1916

Palisade Cell

"Diagram to show the activities going on in a palisade cell. The arrows from the chloroplasts into the…

"Diagram to show the effect of different portions of the spectrum on photosynthesis. a to F, different regions of the spectrum from red to blue. A filamentous alga lies across these, and bacteria are collecting about the alga, with greatest frequency in the red between B and C, indicating the greatest evolution of oxygen there." -Stevens, 1916

Photosynthesis

"Diagram to show the effect of different portions of the spectrum on photosynthesis. a to F, different…

This illustration shows the structure of the thallus of Ricciocarpus: A, section of the thallus, showing the apical cell, x, forming cells that by further division develop into plates of cells separated by air spaces, j. At the left the plates thus formed are seen curving over the apical cell. B, an olderp ortion of the upper part of the thallus. The air spaces, j, are greatly enlarged and the upper cells of the vertical plates have divided, arching over the air spaces but leaving small openings which permit the entrance of air for photosynthesis.

Ricciocarpus

This illustration shows the structure of the thallus of Ricciocarpus: A, section of the thallus, showing…