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| organisms having pairs of homologous chromosomes |
| group of mostly aquatic eukaryotic organisms which conduct photosynthesis and make their own food |
| pericycle (pěr'ĭ-sī'kəl) Pronunciation Key
A layer of nonvascular tissue that surrounds the vascular tissues in the roots of plants and is in turn surrounded by the endodermis. New lateral roots begin growth from the pericycle. |