DIVESITY OF PLANTS
abidaThe presence of variety of plants in the form of different tans (specie, genera) is called diversity of plant. Different plants have different morphology, physiology, cytology and anatomy. It produces…
FURTHER PHYLOGENETIC CONSIDERATIONS
saadiaFURTHER PHYLOGENETIC CONSIDERATIONS Debate is still going on the position of these phyla. There are different views aboutthe origin of these phyla 1. Polyphyletic: It means that all phyla have…
ROSE FAMILY: ROSACEAE – characters , floral formula and importance
sidraROSE FAMILY : Rosaceae Diagnostic characters Habit: Perennial; herbs, shrubs, and trees. Roots: Fibrous tap root and fibrous adventitious roots. 3.. Stem: Herbaceous or woody; stem is covered with prickles.…
THEORIES OF SUCCESSION
sanaThere are three theories of succession about climax communities: Monoclimax theory This theory was put forward by an American ecologist Frederick Clements in 1916. According to this theory there is…
PHYLUM CTENOPHORA (Or. kteno, comb + phoros, to hear)
PHYLUM CTENOPHORA (Or. kteno, comb + phoros, to hear) Animals in the phylum Ctenophora are called sea wnalnuts or comb jellies. This phylum has 90 described species. These all species…
Hydrosere stages (Succession in water bodies)
Hydrosere succession occurs in water bodies undergo. It has following stages: Submerged stage The plants are entirely submerged near the bank of lake or pond. These are the pioneers of…
Xerosere (Succession in dry conditions) – xerarch
The succession occur in dry condition is called Xerosere (xerarch ) . It undergoes following stages. Crustose lichen stage Crustose are land lifeless structure. The crustose may have an external…
DEVELOPMENT OF SUCCESSION
The process of community development is called succession. Different stages are involved in the development of succession in a bare area. These stages are migration ecesis. aggregation, competition reaction and…
CLASSIFICATION
CLASSIFICATION Phylum coelentrata has four classes: 1. Class Hydrozoa Hydrozoans are small common cnidarians. Most of the cnidarians are marine. But this class of cnidarians has also freshwater species. Most…
PLANT SUCCESSION
The process of community development is called succession. Community changes alter the ecosystem . This change favours the competitors. Thus the species replace one another. Finally a stable. self sustaining…