crassula
crassula (bar of Sanio) In the tracheids of gymnosperms, a bar-like thickening in the cell wall and intercellular material. Crassulae occur in pairs, associated with the bordered pits.
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Description
In higher organisms, inclu… Guard Cell , guard cell A specialized type of plant epidermal cell (see EPIDERMIS), 2 of which surround each stoma. Changes in their turgidity cause stomatal open… Tracheid , tracheid One of the long, cylindrical, tapered cells in a trachea. The cell is dead and the wall has bands of lignin in it which add structural stren… Meiosis , Meiosis is a type of cell division that, in humans, occurs only in male testes and female ovary tissue, and, together with fertilization, it is the p… Circular Dna , A chromosome is a threadlike structure found in the nucleus of most cells. It carries genetic material in the form of a linear sequence of deoxyribon…
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crassula