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Plants

biology3

QuestionAnswer
Types of roots Tap root, Fibrous roots and adventitious roots
What is tap roots? Consist of a main root initial root that emerged from the seed( called a radicle)Lateral or secondary roots emerge from the primary roots
What is fibrous roots? Form when the radicle dies away to leave a group of equal-sized roots, emerge from the base of the stem,e.g grasses
What is adventious roots Are the roots that do not develop from the radicle
Zones of roots Differentation Elogition Cell production Protection
Zones of differentation Dermal tissue Ground tissue Vascular tissue
Functions of roots Absorb waater and minerals Transport Store foods
Functions of stems Transport water and minerals Transport food Carry out photosynthesis Store food
Venation Parallel venation Reticulate venation
Functions of leaves Make food Exchange gases with the atmosphere Lose water Store food
Xylem Xylem traecheids Xylem vessels Lignin
Phloem Living tissues that transports food
Transport system in plants Organisms that make their own food are said to be autotrophic
Water by roots Roots hairs extensions of root epidermis cell Wall no covered Absorption Increase the surface are for the absorption water Absorption water by osmosis Diffuse cell into ground tissue
2 movements of water Root pressure and transpiration
Root pressures When water is drawn into roots by osmosis, the build-up of water causes a pressure. Root pressure pushes water up through the xylem
Transpiration Is the loss( by evaporation)of water vapour from the leaves and other aerial parts of a plant
Most transpiration take place through openings called...on the underside of the ... stomata/leaf
Created by: ppsaura
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