Life forms - qualitative characters, Biology

Assignment Help:

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.


Related Discussions:- Life forms - qualitative characters

Define vitamin requirements for preterm and low birth weight, Define Vitami...

Define Vitamin and Mineral requirements for preterm and low birth weight? Care to be taken for calcium and phosphorus intake in preterm infant. Due to inefficient sodium conser

Determine when the virus is in an inactive state, What is meant when it is ...

What is meant when it is said that a virus is in an inactive state? Viruses considered in inactive state are those whose genetic material is within host cells without synthesis

Radioisotopes, Radioisotopes Radioisotopes are those forms of an elemen...

Radioisotopes Radioisotopes are those forms of an element which exhibit rzdioactivity and so can be used as markers or tracers. For this purpose, we first introduce the radiois

What are the biological troubles, Q What are the biological troubles that m...

Q What are the biological troubles that molluscs face due to their soft body? Because molluscs have a soft body they are further fragile. They also have more complexity to supp

Two adjacent cells is an effective transport pathway, Which one of the foll...

Which one of the following structures between two adjacent cells is an effective transport pathway? 1. Plasmodesmata 2. Plastoquinones 3. Endoplasmic reticulum 4. Plasm

Define precautions for testing quality of water, Define Precautions for Tes...

Define Precautions for Testing Quality of Water? 1. Handle the sewage water with care as it may contain enteric pathogens. 2. Sewage and pond water should be shaked before i

Ecological adaptations in animals to desert environment, Ecological adaptat...

Ecological adaptations in animals to desert environment In response to scarcity of water, animats adcipt vario6s strategies to conserve or prevent loss of water. Most of the de

Explain the cardiovascular effects, Explain the Cardiovascular Effects? ...

Explain the Cardiovascular Effects? You must have heard of the 'French Paradox'. The lower incidence of heart attacks in certain areas of France despite higher prevalence of fa

Explain long-term risk estimation, Explain Long-term Risk Estimation ? ...

Explain Long-term Risk Estimation ? Many studies have examined long-term risks associated with risk factors using traditional epidemiological methods. Framingha investigators

Explain in brief about the extra-ocular muscles, Extra-ocular muscles ...

Extra-ocular muscles There are, as you know, six extra-ocular muscles. Out of these, four are recti(straight) and two are oblique. They control the position and movement of th

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd