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Leptosporangium vs Eusporangium

Leptosporangium vs Eusporangium – In the first step in leptosporangium, the epidermal cells of leaf or sporangiophore some sperm cells behave as superficial initial cells. Superficial initial cell divides periclinally due to which to form two celled body structures. Secondly, the outer cell as sporangial initial cell and inner cell that does not take part in further division as stalk ...

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Sporangium and Different Spore Types

Sporangium Sporangium has been derived from modern Latin word “spora” means spores and classical Greek word “angeion” which means vessel. So, sac like structure, which develops spores as tetrad after meiosis of spore mother cell. Spore: Reproductive unit of a plant body which upon germination to form a new plant body. Types of Sporangium (Depending upon Organization with Position, Shape, ...

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Precipitation

Precipitation is condensation of water vapours in the form of rain, hail, snow etc.Precipitation (rainfall, snowfall) is the major source of soil moisture. All soil moisture is derived from precipitation. It is the driving force of the water cycle as well. Precipitation begins as water vapour derived from the surfaces of oceans in the atmosphere which condense to form clouds ...

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Types of Self Pollination

Pollination is the transfer of pollen from the anther to the stigma of the same flower or of another flower on the same plant, or of another flower on a different plant of the same species. When the anthers are fully mature they shed off the pollens either through slits in their walls or through terminal pores. The pollen is generally ...

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Glossary of Botanical Terms

Following are the glossary of botanical terms and their definitions are as follow: Diversity: The presence of variety of plants in the form of different taxas (specie, genera) is called diversity of plant. Systematics: The study of kinds and diversity of organisms and the evolutionary relationships among them is called systematics or taxonomy. Alternation of Generation: The phenomenon in which ...

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Diversity of Mammalia

Diversity of Mammals

Current vertebrates have following attributes: 1. They have hair on the body. 2. They have mammary organs. 3. They have specific teeth. They have heterodont dentition 4. Three center auto ossicics are available. 5. Stomach is available in them. 6. Their skin has sweat, sebaceous. fragrance organs. 7. Theirheart is four-chambered. 8. They have extensive cerebral cortex. The zoologists differ ...

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characteristics, types and functions Permanent tissue

parenchyma tissue Structure

characteristics, types and functions Permanent tissue Attributes of lasting tissue:    Changeless tissues are subsidiaries of meristematic tissue They are develop tissue and the cell have lost the limit of cell division.   Sorts of changeless tissue    Straightforward lasting tissue Complex changeless tissue Secretory tissue 1. Straightforward lasting tissue    Straightforward lasting tissue is made out of single kind ...

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Want to start a garden this fall? Try these planning tips

Gardening Tips

Fall is an extraordinary time for planting in Texas. Temperatures are beginning to cool (a smidgen at any rate), and with normal precipitation designs, regardless we see a lot of rain to help recently planted blossoms, trees and bushes set up. Be that as it may, rather than protecting that marked down plant at the crate store or drive purchasing ...

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Impacts of climate change on the phenology of pollen release of birch Betula pubescens and consequences for human health

Phenology, pollen, birch Betula pubescens and B. pendula are dominant allergic tree species across Europe. Other Betulaceae species such as Corylus avellana and Alnus glutinosa may cause similar allergic reactions. These can have a ‘priming effect’ on those allergic to Betula pollen as they flower earlier, thus lengthening the period over which allergy sufferers are exposed. The aim of this ...

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