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Symbiotic interaction - Biological Stress
Presence of symbiotic microorganism can result in differential growth stimulation of those plants which can recognise the beneficial symbionts and utilise their presence in the environment. This interaction is a mutual one. For example in Rhizobium-legume symbiosis the rhizobium causes a drain on the carbon fixed by the plant while the plant gains access to the nitrogen fixed by the bacteria.
Photoperiodism Activity like breeding and migration in animals; flowering, seed germination in plants are regulated by the length of daily period of light and darkness. This be
Entamoeba Histolytica Losch (1875), for the first time, described the disease symptoms of infection of Entamoeba histolytica. However, it was only in 1903 that Schaudin gave t
Two compartments of equal volume of physiological saline are divided by a membrane permeable only to oxygen. At 1 AM, equal amounts of oxygen are dissolved into both left and
Science in the ancient world: We have explained why we should study the history of science and what we mean by the history of science. We have seen what science is like in t
A complete gut is sometimes called tube within a tube. Why?
What is the karyotype found in Down syndrome? Down syndrome is the aneuploidy that is a numeric alteration of chromosomes within the cells compared to the normal number of chro
Q. What is polyembryony? Polyembryony is the phenomenon in which a single embryo in its initial embryonic stage divides itself forming many new individuals of genetically ident
Define Active or moderately active Lifestyles - physical activity? These people have occupations that p-e not strenuous in terms of energy demands, but involve more energy expe
what is ecology
In this section, we shall discuss a classic example of natulal selection in action. In the preceding unit, it was stated that natural selection always aims at eliminating alleles,
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