One type of it is stem cells. Queiscent cells are adult cells which do not divide, but under certain stimulation when it is needed, it can undergo cell division. One example are hepatocytes (liver cells).Permanent cells are cells that do not divide at all and have no such capabilities.ne type of it is stem cells. Queiscent cells are adult cells which do not divide, but under certain stimulation when it is needed, it can undergo cell division. One example are hepatocytes (liver cells).
Hairs trap a still layer of air to slow the rate of water vapor loss. Epidermal tissue has stomatal guard cells that regulate transpiration. Vascular tissue has a role in internal transport of water from root to leaf. The xylem is lignified to control water dispersal from the column. Limiting water exit to the plasmodesmata (desmodesmata) channels through cell walls.
Trees supply leaves with water because of a decrease in hydrostatic (water) pressure in upper, leaf-bearing parts called crowns or canopies. The pressure difference lifts the water to the leaves. Ninety percent of tree water is eventually dispersed from leaf stomata, through evaporation, into the atmosphere.That beneficial loss of water from plants is called transpiration.he pressure difference lifts the water to the leaves. Ninety percent of tree water is eventually dispersed from leaf stomata, through evaporation, into the atmosphere. That beneficial loss of water from plants is called transpiration.