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Periodicity (Phenology, Aspection)
It refers to the study of seasonal changes in the community, that is, the periodic phenomena of organisms in relation to their climate. Periodicity is a strongly fixed characters in plants. Different species of plants have different periods of seed germination, vegetative growth, flowering and fruiting, leaf fall, seed and fruit dispersal, and dissemination of seeds.
Such data for each species in a community is recorded. A study of the data and time of these events is termed as phenology. In other words, phenology is the calendar of events in the life history of a plant. Diagrammatic representation of such events is known as phenograms.
Embryo-sac : Embryo-sac is formed from megaspore mother cell. In embro-sac, there are 7 cells arranged in 3 groups. The 7 cells are one egg (female gamete), 2 synergids,
Functional properties of food lipids Chemically, fats and oils, as you may already know by now, are a combination of glycerol and fatty acids. The glycerol molecule has three s
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Gonial Apospory and Somatic Apospory Gonial Apospory There is no meiosis. The megaspore mother cell enlarges; a small vacuole appears above and below the nucleus. The c
Define the Sleep disorder - Effect of Obesity? One of the common problems that obese males and females suffer from is sleep disorder, commonly known as sleep apnoea. Obesity ca
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What is the type of reproduction that occurs in roundworms? What typical element do nematode sperm cells have? Nematodes reproduce sexually. The nematode sperm cell does not h
digram or mammalian testis
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