Life forms - qualitative characters, Biology

Life Forms - Qualitative Characters

The form and structure of terrestrial communities are determined by the nature of vegetation. Vegetation may be classified according to growth form. The plants may be tall or short, herbaceous or woody, evergreen or deciduous. We might speak of trees, shrubs, and herbs, and then further sub-divide these categories into needle-leaved evergreens, broad-leaved evergreens, broad-leaved deciduous, shrubs, ferns, grasses and so on and so forth.

A more useful system was proposed by a Danish botanist, Christen Raunkiaer in the year 1903. In this system, instead of considering plants' growth form, he classified plants by life form, the relation of their height above ground to their perennating organ. A perennating organ is one that survives from one growth season to the next, remaining inactive over winter or dry periods. Perennating tissue is the embryonic or meristematic tissue of buds, bulbs, tubers, roots and seeds.

Posted Date: 1/19/2013 7:29:50 AM | Location : United States







Related Discussions:- Life forms - qualitative characters, Assignment Help, Ask Question on Life forms - qualitative characters, Get Answer, Expert's Help, Life forms - qualitative characters Discussions

Write discussion on Life forms - qualitative characters
Your posts are moderated
Related Questions
Components of a Balanced Diet Food which we eat, has effect on the growth and development, and the maintenance of normal body functions. Hence, a good balanced diet is needed t

Unit Membrane Model Lamellar model was supported by Robertson. According to Robertson - All biomembrane have similar structure (like PM), on the basis of this observati

Q. What are zoonoses? What are few examples of zoonoses transmitted by birds? Zoonoses are human diseases transmitted by animals. Psittacosis, a bacterial disease, cryptococcos

Q. Symptoms of Non-Ketotic Hyperosmolar Diabetic Coma? Following are the signs and symptoms of NKHDC: 1) Polyuria 2) Polydipsia 3) Weight loss 4) Mental Confusion

Why would a tongue not detect mild sweetness after eating foods with high sweetness? This happens due to of the "desensitization" of sensory receptors on the sensory cells of y

Discuss about xeno-transplanation Most defects / diseases treated by xeno-transplanation are not genetic in origin so the therapy will have no impact on gene pool in terms of c

Determine Health Hazards Associated with High Altitude? Abrupt exposure to altitudes greater than 10,000 ft (3050 in) elevation is frequently associated with symptoins of altit

Decreasing power is available in a cell both as NADPH and NADH but these have quite distinct roles. NADH is oxidized by the respiratory chain to produce ATP by oxidative phosphoryl

Gluconeogenesis that is also called as GNG is a metabolic pathway which results in the generation of glucose from non-carbohydrate carbon substrates such as pyruvate, glycerol, lac

Q. Explain Spoilage of Cereals and Cereal Products? Cereals are the main source of energy to human beings. There are several varieties of cereals, of which wheat and rice are t