Author Archives: I am hassan

Structure and Life Cycle of Marine Water Brown Algae Ectocarpus

Marine water brown algae”Ectocarpus” is abundantly found throughout the world in cold waters. A few species have been reported to occur in freshwaters. The plant grows attached to rocks and stones along coasts both in the littoral and sub-littoral zones. Some species are epiphytes on other algae especially the members of Fucales and Laminariales. Ectocarpus stands for (ecto=external + carpus=fruit). Structure ...

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Helianthus annus (Sunflower) Family Astraceae Compositae

Astraceae is the largest family of angiosperms comprising of 950 Genera and approximately 20,000 species. Most common genera are Helianthus annus (sunflower), Sonchus asper (dodak), Carthamus tinctorius (kusum), Artemesia absinthium (afsantin), Lactuca sativa (salad), Ageratum conyzoides, Tagetes (gainda), Zinnia, Xanthium, etc. The members of the family are worldwide in distribution. Distingushing Features Helianthus annus (sunflower) Herb, with simple alternate leaves, flower is capitula, ...

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Structure and Reproduction in Chara-Fresh Water Green Algae

Chara grows submerged in fresh water and upon muddy or sandy bottoms of pools and ponds, or in limestone streams. Certain species have the capacity of precipitating calcium carbonate from the water and covering themselves with calcareous layers. Clear hard water is suitable for their growth. Mature plant is enriched with CaCO3. Therefore, they are called as stone worts. Structure ...

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Family Rosaceae Rosa indica (Rose-Gulab)

The Rosaceae family consists of about 115 genera and 3200 species. The members of the family are worldwide in distribution. Such as Rose Gulab (Rosa indica). They are found in temperate and cold regions. The family is important for its valuable fruit plants and beautiful and fragrant flowers. The common representative genera are: Rosa indica (gulab), Prunus spp (badam, khubani, ...

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Structure and Reproduction in Pinnularia

Pinnularia is very common in fresh water ponds, ditches, on the surface of mud in the drying ponds and on the moist soils. The Taxonomic Positions, Structure, Reproduction of Pinnularia are as follow. Taxanomic Position Division: Bacillariophyta Class: Bacillariophyceae Order: pennales Family: Naviculoideae Genus: Pinnularia Structure Cell The plant consists of single cell, which is elongated or elliptical in outline. The cell ...

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Structure and Life Cycle of Spirogyra

Spirogyra is one of the commonest and large genus with about 300 species growing as free-floating masses in stagnant or slowly moving waters (streams). Some species, e. g., Spirogyra adnata are attached to the substratum through a basal rhizoidal cell. The masses of plants are slimy to touch because the filaments are surrounded by pectic sheaths which when come in ...

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Structure and Reproduction in Volvox (Green Algae)

The Volvox is a green, flagellated, colonial algae found in both temporary and permanent water ponds, pools and ditches. It usually grows in spring and summer but abundant growth takes place during rainy season. The colonies are found in the form of small balls of the size of a pin-head which are visible to the naked eye. It passes winter in ...

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Chlamydomonas Structure and Reproduction

Chlamydomonas Chlamydomonas is fresh water free swimming alga. Many species occur in waters having, high content of organic matter. It is frequently found in standing water and ponds, ditches, pools, rain water and in damp soil. Kingdom: Plantae Division: Chlorophyta Class: Volvocales Order: Chlorophyceae Family: Chlamydomonadaceae Genus: Chlamydomonas Structure of Chlamydomonas Structure The plant body is thallus, which consist of ...

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Economic Importance of Algae

Economic Importance of Algae The use of algae is very old and is mentioned in the Chinese poetic literature about 600 B.C. The phycologists are continuously working to get hold of their economic importance and have unearthed many beneficial as well as harmful economic aspects of algae. Beneficial Aspects of Algae Some of the beneficial roles exhibited the algae are ...

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Life Cycles in Algae

Algae. The sequence of events through which an organism passes from zygote to zygote of the next generation is called its life cycle. Generally, five types of life cycles are found among sexually reproducing algae. Haplontic Life Cycle The life cycle during which the haploid phase is long and represents almost all the stages of the life except the diploid phase ...

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