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what is an argument that shows that the emergence of photosynthetic beings was crucial for life to reach the marine surface and later the dry landthe
why is it more probable that the photosynthetic prokaryotes appeared before the aerobic eukaryotesit is more feasible that photosynthetic prokaryotes
how did the first fermenting autotrophs appeared what about the first aerobic beingsa heterotrophic hypothesis asserts that the first living beings
what evidence strengthens the hypothesis that chloroplasts could have been photosynthetic prokaryotes and mitochondria could have been aerobic
how have prokaryotic cells given origin to aerobic eukaryotic cells and to photosynthetic aerobic eukaryotic cellsas per to the most accepted
what is the evolutionary origin of the internal membranous organelles of the cellit is accepted that the internal membranous organelles of the
how could coacervates have facilitated the emergence of life on earthcoacervates probably provided a nitid separation between an internal and an
how can coacervates be formed of phospholipids or polypeptidesphospholipids are amphipathic molecules ie they present a polar portion and a nonpolar
define factors affecting microbial survival and growthmicrobes commonly present on the food we have seen include members of the genera bacillus
microorganisms that survived the preservation and shortage treatment applied to the fooddifferent microorganisms have different susceptibility to the
microorganisms acquired during transport handling and processing of raw foodsmicroorganisms can come from truck tanker food handlers and equipment
what are coacervatescoarcervates are small structures made of the aggregation of organic molecules under water solution by electrical attraction the
explain microorganisms associated with the raw foodsfoods of animal and plant origin are in direct contact with air soil and water and get
q procedures adopted by numerical taxonomistssince numerical taxonomy is an operational science the procedure is divided into a number of repeatable
what was the experiment of stanley miller 1953 on the origin of lifein 1953 the stanley miller arranged an experimental apparatus that simulated the
explain the sources of microorganismsmicroorganisms are virtually present everywhere in nature including air water and soil the microbial flora is
q principles of numerical taxonomynumerical taxonomy is based on the following 7 principles1 the greater the content of information in the taxa of a
explain the analysis of food samplesnow in this practical we shall deal with the endogenous and exogeneous microorganisms which are present on the
which physical elements contributed to the great amount of available energy on the primitive earth at the time of the origin of life35 billion years
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