TERMS DEFINITIONS Community The populations of different species living in the same habitat is called community. Analytic characteristics The characteristics which can be analyzed by Quantitative or qualitative …
Kingdom: Bacteria Phylum: Cyanobacteria Order: Nostocales Family: Nostocaceae Genus: Anabaena Common species A. aequalis A. affinis A. angstumalis angstumalis A. angstumalis marchita Occurrence Anabaena is a genus of filamentous cyanobacteria,…
The Cyanobacteria are the largest and most diverse group of photosynthetic bacteria. They were previously known as blue green algae. They show following characteristics: Cell type: They are true prokaryotes.…
The vegetation in Pakistan is divided into five categories on the basis of climate, altitude and plant types. These are: Dry tropical forest vegetation Dry sub-tropical sub-mountainous vegetation Dry Temperate…
The rate at which food is manufactured by the producers in unit area in unit time is called productivity. There are following types of productivity: Primary Productivity The rate at…
There are following groups of bacteria Archeobacteria: They are most primitive organism on the earth. The lack peptidoglycan in their cell wall. The live in the deep sediments of oceans.…
Bacterial Reproduction Both asexual and sexual reproduction occurs in bacteria. Asexual reproduction Asexual reproduction in bacteria occurs by binary fission. It occurs during favourable conditions. The size of bacteria becomes…
(I) Cell Membrane Cell membrane or plasma membrane is present beneath the cell wall. It is very thin and flexible. It completely surrounds the cytoplasm. Chemically, it is composed of…
Flagella are extremely thin hair like appendages. They originate from basal body and come out through cell wall. The basal bodies are present just beneath the cell membrane in the…
Fig: A generalized bacterial cell GENERAL STRUCTURE OF BACTERIA Bacteria are unicellular prokaryotes. They lack true nucleus and other membranous bound organdies. Some species form colonies. Most prokaryotic have…
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