Biology

They are very elongated, slender, thick-walled and both the ends of them are pointed, but sometimes may be rounded. In their walls, they have pores called pits. These long cells have arranged an end to end with others.

Position of wood fibers They are present in the xylem throughout dicots. Function of wood fibers The functions of wood fibers are- Transportation of water and minerals Storage of food Giving mechanical support Giving strength of plants

Due to chromoplast the flowers and fruits are colored. Though the chromoplasts are colored, they are not green. The phycoerythetic pigment xanthophylls, carotene, phycoerythrin, phycocyanin etc. are present in them, and so some of them are yellow, some others are blue and red. The flowers, leaves, and other parts of a plat assume their attractive … Read more

These cells compared with most fibers are shorter, isodiametric, or sometimes long and star-shaped. Their secondary cell walls are very durable, thick, and lignified. The walls of the cells are pitted.

The characteristics of a eukaryotic cell are – Nucleus is well structured. Nuclear membrane and nucleolus are well organized. Chromosomes are organized with protein and other components. Along with the ribosome, other cell organelles are present in the cell.

In the cortex, fruits, and seed shells of gymnosperm and fruits and seed shells of gymnosperm and dicot plants, sclerites are found. In the petioles of leaves, they may be present in cluster form associated with epidermis, xylem, and phloem.

The functions of the cell wall are to protect a cell form all external injuries. It gives a cell its rigidity. The cell wall retains the shape and size of a cell. For exchanging materials with the adjacent cell. Plasmodesmata are formed in a cell wall. The cell wall controls the movement of water and … Read more