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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
explain the confirmed test - most probable number testconfirmed test is carried out to rule out the possibility of any positive presumptive test
how old is the earthit is believed that the earth is about 45 billion years
what is the main moral problem about the cloning of human individualsas well biological perils a very serious moral problem involves the nucleus
q what do you mean by chromosome numberwe are generally aware that the number of chromosomes in each cell of all individuals of a single species is
why are the recombinant dna technology and the nucleus transplantation technology still dangerousa recombinant dna technology and the nucleus
q what do you mean by cytotaxonomu and biosustematicstowards the end of the 19th century and in the early years of the 20th century botanists were
explain the presumptive test - most probable number testthe presumptive test is used to detect and estimate coliform population of a water sample
what is the fact of molecular biology on which dna fingerprint is basedthe dna fingerprint the method of individual identification using dna is based
q show the value of embryologythe value of embryology in solving taxonomic problems can be appreciated by studying some specific cases amongst the
what is pcr how does pcr worksthe pcr polymerase chain reaction is a method to synthesize many copies of specific regions of a dna molecule known as