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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.
Heteroduplex Dna is generated by the base pairing between complementary single strands derived from the different parental duplex molecules; heteroduplex DNA molecules occuring du
Evolution of heart in higher animals The circulatory system in higher animals has undergone several changes during evolution. The heart has become totally muscular. Th
Q. What is the osseous cavity where the pituitary gland is located? The hypophysis or pituitary gland is located in the sella turcica of the sphenoid bone (one of the bones in
Assuming that the equilibrium potential for sodium ion across a skeletal muscle is +66 mv at a temperature of 37 degree celcius when the external concentration is 145 mM and the in
what is common between aquatic and terrestrial plants
EVOLUTION OF MAN - Mammals evolved from primitive reptiles (therapsida) in Triassic period, about 210 million years ago. Mammals existed as inconspicuous group of small
General Characters-
Food borne intoxications are basically food borne illness caused due to ingestion of toxin produced my microorganisms (mycotoxins, bacterial toxins). Natural toxins present in food
Seed A seed is a mature ovule enclosing an embryonic plant, stored food material (in endosperm, persistent nucellus or embryo itself) and a seed coat formed by one or two inte
How do taenias obtain food and make gas exchange? Tapeworms have hooks and sucking structures on their heads (scolex) that fixate the parasite in the gut wall; these structures
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