TABLE 8-2 Cell Types Present in Wood Conifers Eudicots* Axial system Tracheids Present Present Vessels Absent Present Fibers Very rare Present Parenchyma Very rare Present Radial system Ray parenchyma Present Present Ray tracheids Present Absent *Eudicot wood is extremely variable; certain species lack some of these cell types, other species have them all. The relative amounts of each vary greatly.
Plant Structure and Growth
Roots anchor, the plant, ingest minerals and water, direct water and supplements, and store food. These are two kinds of root frameworks.
Plant Life Cycle
Plants are part of the PLANT KINGDOM, which is one of the five kingdoms of life. Plants are divided into smaller classes based on common characteristics. Certain characteristics are shared by all plants. They are made up of a large number of cells. They also make their own food through a chemical process called photosynthesis, which involves the use of water, carbon dioxide, and solar energy. They pump life-giving oxygen into the air as a by-product.
Life Cycle of Plants
All the organisms that belong to the Kingdom Plantae are known as plants. They are multicellular and eukaryotic and can synthesize their food by photosynthesis, known as autotrophic organisms. They are classified based on certain characteristics, such as the plants bear flowers; some have only naked seeds and do not contain flowers. Some plants neither have seeds nor flowers, such as ferns and mosses.
Plant Morphology and Anatomy
The study of life and organisms is biology. The cell is recognized as the basic unit of life by biology. From ancient Greek, biology is recognized. Modern biology deals with the recent developments in Science.
In gymnosperms (conifers like Christmas trees), what types of cells occur in the axial system (the cells produced by fusiform initials)? Which cells are very
rare (as shown)? Wood of conifers is called because a certain type of cell is absent from their axial system. Which type of cell is that?
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