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Which type of cell came first in evolution the eukaryotic cell or the prokaryotic cell?
Ans) This is an interesting problem of biological evolution. The most accepted hypothesis asserts that the more easy cell, the prokaryotic cell, appeared early in evolution than the more difficult eukaryotic cell. The endosymbiotic hypothesis, for example, affirms that aerobic eukaryotic cells appeared from the mutualist ecological interaction among aerobic prokaryotes and primitive anaerobic eukaryotes.
Potato type: Potato A: Beginning displacement (ml)= Ending displacement (ml) = Potato B: Beginning displacement (ml)= Ending displacement (ml) = Potato type: Potato A: Beginn
Ammonification Many heterotrophic bacteria actinomycetes and fungi in soil and water metabolise the organic nitrogen and release it in an inorganic form as ammonia. This proce
Colibacillosis of newborn animals This is the commonest disease entity of newborn farm animals. In calves the disease occurs in three forms, viz. enteric colibacillosis manif
Q. What is the function of the antidiuretic hormone? Where it made and which is the stimuli that increase or reduce its secretion? The antidiuretic hormone is secreted by the h
Q. Spontaneous deamination of cytosine: 1. Deamination of cytosine is common and results in conversion of cytosine to uracil 2. can be repaired by excision repair process (i)
Anthrax Anthrax is primarily a disease of the herbivores and occurs in almost all parts of the world. The disease has declined recently throughout the world as a result of the
Q. What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them? Vitellus (yolk) is the nutritive m
Swine influenza Swine influenza, a highly contagious disease affecting the respiratory tract of pigs, is c a use d b y a vir us b e lo nging t o the ge nus I nflu e nz a vir
Q. Since pepsin is a gastric enzyme does it have a basic or an acid optimum pH? What happens to pepsin when it passes into the duodenum? Pepsin acts contained by the stomach so
Sterility in Angiosperms Sterility in angiosperms may arise due to several causes. Either the anther may not be formed, or anthers are formed but meiosis may be abnormal. A
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