Examlex
Which of the following was NOT considered a drawback to Soviet life?
Stomata
Singular stoma. Of plants, tiny gaps between pairs of guard cells in epidermis; allow internal tissues to exchange gases with the air. Can be closed to prevent water loss.
Photosystems
Cellular structures in chloroplasts where light energy is converted into chemical energy during photosynthesis.
Pigment
Substances that impart color to materials or organisms; in biological contexts, they absorb certain wavelengths of light and reflect others, visible to the human eye as color.
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