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Showing posts from April, 2020

Batrachospermum :Origin ,strucutre ,Thallus organisation and reproduction

                                              Batrachospermum Occurrence:-   (1) Batrachospermum is fresh water alga.    (2) It is found in clear, cool, and running streams.   (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green.   (4) The intensity of light changes the color of pigments.   (5) The thallus is attached to the substratum. Vegetative structure  (1) The thallus of an adult plant is soft, thick, filamentous.  (2) It is freely branched and gelatinous.   (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth        are developed on this axis.  (4) These branches are filamentous and dichotomously arranged.  (5) The main axis is corticated. It consists of a row of elongated cylindrical cells.   (6) It is differentiated into nodes and internodes.   (7) There are two types of branches that arise from the nodes:       Branches of limited growth        Branches of unlimited growth Batra

Poaceae -Graminae Family

What plant is the largest member of the Poaceae family? Which plant belongs to the grass family? What genus is grass?  What genus is grass?                                                                                                                     POACEAE (GRAMINAE)                                                                      Habitat :-   Herb : - Non-cultivated and non-woody stem. Which can be easily broken. Its height is about between 1 to 2 feet. E.g. wheat, rice,   maize, etc. Oryza Sativa Shrub:   Woody stem, height is about 3-4 feet and having a bush-like appearance. Wheat Tree: Woody stem which is hard and can’t easily broke it and large in size. E.g. bamboo Bamboo Annual : Those plant which can live in one year to complete its life cycle in one year either seed germination and flowering. E.g.   wheat, maize, etc. Biennial : Those plant which can complete its life cycle in two years.

Classification of Angiosperms Flowering plants

Classification of Angiosperms :-The Flowering Plants Monocots :-          Single cotyledon                      Parallel veins                      Flowers in multiples of 3’s Dicots :-                      Two cotyledons                       Netted veins                       Flowers in multiples of 2, 4, or 5. MONOCOT-PLANT Dicot plant     FRUITS :-                SIMPLE                       Dry (poppy seed, milkweed, wheat)                       Fleshy (peach, plum, apple, tomato, grape). AGGREGATE                       Flowers with several carpels                       Raspberry, strawberry. MULTIPLE                       Cluster of flowers                        Pineapple. SIMPLE.AGGREGATED AND MULTIPLE FRUITS SEED STRUCTURES :-              Micropyle                       Opening through which the pollen tube grows to deliver pollen to the ovary (ovules).