In 1883, theodor engelmann devised an experiment to find out which wavelengths of light were most used by photosynthetic organisms. he placed a strip of algae on a microscope slide, and then projected a spectrum of light on the slide. a suspension of oxygen-loving" bacteria was also placed on the slide. based on an understanding of the light reactions of photosynthesis, predict the most likely outcome of the experiment."
cortex, in plants, tissue of unspecialized cells lying between the epidermis (surface cells) and the vascular, or conducting, tissues of stems and roots. cortical cells may contain stored carbohydrates or other substances such as resins, latex, essential oils, and tannins.
a dendrite is an extension of a nerve cell. a dendrite receives impulses from other synapses and sent to the cell body.
the plant makes its own food from sunlight