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q illustrate numerical taxonomytaxonomy today is in many dctails different from what it was a generation ago the use of computers by taxonomists has
was there molecular oxygen in the earths primitive atmosphere how has that molecule become abundantthe presence of the molecular oxygen in the
what are the main constituents of the earths atmosphere in our timethe present atmosphere of the earth is constituted essentially of molecular
explain precautions for performing the completed coliform test1 aseptic conditions should be adopted while performing the experiment2 destaining is
q briefly explain about semantidesthe information carrying molecules in plants are called semantides and they have been recognised to be 3 kinds
explain procedure for performing the completed coliform testcompleted test is the last step in the coliform test procedure which is described
q can you explain secondary metabolitessecondary metabolites or secondary plant products are those macromolecules that lack nitrogen and arc of
explain procedure for the test of presence of coliform bacteriathis test procedure is in continuation to the presumptive test procedure followed on
q what do you mean by primary metabolites as the name indicates primary metabolites are molecules involved in vital metabolic pathways they are of
before the emergence of life of what gases was the earths primitive atmosphere constitutedthe earths primitive atmosphere was fundamentally formed of
what is the most accepted hypothesis about the origin of life on earth how does it compare to the other main hypothesesthe heterotrophic hypothesis
q show the directly visible chemical charactersvery few chemical substances in plants can be observed directly but the few substances such starch
define precautions for testing quality of water1 handle the sewage water with care as it may contain enteric pathogens2 sewage and pond water should
what is the heterotrophic hypothesis on the origin of lifeas per to the heterotrophic hypothesis the first living beings were very simple
what is the autotrophic hypothesis on the origin of lifean autotrophic hypothesis on the origin of life asserts that the first living beings on earth
explain the procedure for testing quality of water using presumptive testnow carry out the exercise following the steps indicated herewith1 make 3
what is panspermiathe panspermia is a hypothesis that describes life on earth as not originated from the planet the thought is that the first living
q show the process of chemotaxonomy chemotaxonomy is a science which uses chemical information as a character for taxonomic purposes before we
how did the experiments of redi and pasteur refute the hypothesis of spontaneous generationto refute the impulsive generation hypothesis many
q what do you understand by chromosome behaviourwhen we study meiosis we not only observe the regularity of pairing which is important for the
what is the spontaneous generation hypothesis the impulsive generation abiogenesis or hypothesys asserts that life on earth has come from nonliving
historically how has the origin of life on earth been explainedthe mainly recurrent explanation for the phenomenon of life on earth is the
explain the completed test - most probable number testcoliform colonies on emb or endo agar are further examined by completed test by inoculating
when did life appear on earthit is estimated that the life on earth emerged about 35 billion years ago thus 1 billion years after the formation of
how old is the universefrom the analysis of data collected by the hubble telescope the age of the universe is estimated to be about 12 billion