PRIMARY GROWTH IN STEM
sana Primary growth takes place by the activity of apical meristematic cells of stem. Primary growth passes through following phases. Phase of Cell division: The numbers of cells are increased by…
sana
Structure of Stem (Parts of Stem)
The internal structure of the stem is more complex. Stem is differentiated into nodes and internodes. The leaves are inserted on the nodes. The arrangement of leaves on the ‘nodes…
Secondary Growth of Root
The roots increase in thickness by the formation of secondary vascular tissues. The secondary vascular tissues are produced by the activity of the vascular cambium. It produces the secondary xylem…
Structure of Root
The root is underground part of the plant. It anchors the plant in the soil. It is also used to absorb Water and minerals from the soil. .1–he root structure…
OBJECTIVE FOR APPLIED ECOLOGY
Multiple Choice Questions (MCQs) Average rain fall in Pakistan is less than (a) 400mm (b) 250mm (c) 340mm (d) 450inm The percentage of earth covered with water is: (a) 50%…
SUBJECTIVE AND SHORT QUESTION FOR APPLIED ECOLOGY
MODEL SUBJECTIVE QUESTION: Write note on aridity. Write not on biodiversity. Write note on conservation What is water logging? Give its causes, effects and control measures. What is salinity? Give…
DEFINITIONS AND KEY POINTS FOR APPLIED ECOLOGY
TERMS DEFINITIONS Aridity The word arid means dry. The dry land is called arid land. This problem is called aridity. Arid climate Arid climate is defined as the climate in…
MANAGEMENT
There are following application of ecology in different environmental managements: Land management The operation by which land is prepared for crops plantation, harvesting is called land management. Good land management…
DESERTIFICATION
Spreading of deserts to the green areas is called desertification. Desertification occurs due to human activities. Desertification occurs in grasslands and forests. Earlier, vegetation was present there. But over exploitation…
SOIL EROSION
The wearing away of the soil by wind, water, snow or gravity is called soil erosion. Climatic, topographic. biotic, edaphic, and geologic factors cause the soil erosion. Climatic factors: Wind…