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What is Diatoms? Bacillariophyta are commonly known as diatoms because of their unique structure. These unicellular photosynthetic organisms are composed of two overlapping glass shells that fit together the way old pillboxes did, with one shell fitting inside the other. These microscopic diatoms have distinctive markings, or ornamentation on their shells. Their natural symmetry is visually astounding when viewed under the microscope.
There are two major groups of diatoms, divided on the basis of cell symmetry. The centric diatoms have radial symmetry, oriented around a mid-point much like a wheel and hub, as seen at the left.
Explain the Microscope Colony Counts and Agar Droplets? Microscope Colony Counts - The method involves counting of micro-colonies that develop on agar layered over a microsco
Development of Endosperm In a fertilized embryo sac, the primary endosperm nucleus is generally observed below the zygote. It divides, and further divisions of its products gi
Classification of lipids A general classification of lipids based on their structural components is presented in table. Such a classification, however, is possibly too rigid f
Genic Type-Genetic basis of Sex Determination In some organisms, certain indepe~ident genes located on different chromosomes are responsible for sex determination. Most species
Define the diseses Shigellosis Shigellosis or bacterial dysentery is caused by facultative anaerobic, gram-negative, non-spore forming, rod-shaped Shigella in the family enter
Food Chain - Ecosystem In a food chain, the food energy is transformed from a given source through a series of species, each of which eats the one before itself in the chain.
Question 1 Which are the 3 different processes in the formation of urine? Explain Question 2 Discuss resting membrane potential and nerve action potential Question 3 Nam
Gills - Respiration Gills are highly vascularised extensions of gas exchange membranes. The simple type may be extension of the body surface as in sea-slugs, sea stars and ma
why do ecological models commonly have limited applications ?
Explain Xeno-transplantation Xeno-transplantation could enable individuals to survive and contribute their alleles to the gene pool who might not have already done so thus inc
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