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Q. Which type of cell came first in evolution - the eukaryotic cell or the prokaryotic cell?
This is an interesting problem of biological evolution. The majorly accepted hypothesis asserts that the prokaryotic cell, the simpler cell, appeared earlier in evolution than the more complex eukaryotic cell. The endosymbiotic hypothesis, for instance, affirms that aerobic eukaryotic cells appeared from the mutualist ecological interaction between aerobic prokaryotes and primitive anaerobic eukaryotes.
Q. What are the types of antigenic agents that may constitute vaccines? Vaccines can be constituted of dead agents of disease, of inactivated toxins, of inactivated agents of d
Mas s Extinction - Since beginning many species evolved and got extinct (in fact only 1 % is living). Sometimes it occured suddenly at large scale, (most recently dinosa
What is Secondary Growth explain briefly? Secondary Growth in Stems : Young developing shoots increase in height by adding new cells, which are produced by the apical meriste
Define Life Cycle of Spore Forming Bacteria? One endospore is formed per bacterial cell. The process of formation of endospore is called sporulation that occurs in an organized
Describe the main cycle in metabolism of cornea. Main Cycle: Glycolysis is represented by the central chain and involves the anaerobic conversion of glucose into pyruvic
Sulphur (S) - Macronutrients Sulphur is present in the soil in inorganic and organic forms. In most soils organically bounds is the major S reservoir. The inorganic forms of S
Q. Illustrate Pulmonary Artery Enlargement? On the PA view, the pulmonary trunk is border forming for a short distance between the aortic knuckle and the left atrial appendage.
Q. What are a few diseases characterized by progressive loss of the axonal myelin sheath? Multiple sclerosis is a severe disease caused by progressive destruction of the myelin
complete assignment
How did Pasteur's experiment vary from Spallanzani's experiment? Instead of sealing the flask in the experimental group after boiling, Pasteur used a flask with a curved neck,
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