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role of glucose -maximum part of energy in percentage is obtained by oxidation of glucoseenergy is released quicklyin blood 1 glucose c6h12o6
role of nacl -it forms 9 of blood of mammal it forms 7 of blood of frogbicarbonates of na act as buffer for ph constancyinvolved in active transport
role of water -in general water constitutes 60-90 of protoplasm average 80it forms 23 of human body weight ie 6666due to electrophillic nature of o
metabolism -word given by shwannit includes bio-chemical reactions occur in body may be constructive or destructiveit includes -
biology in dispelling myths and misbeliefs -varieties of myths still exist in our society and can be removed by the knowledge of biology some of
scope of biology-present century is witnessing explosion of information in modem biology directly related to life and health issues like global
differences between hypothesis and theory - 1hypothesis it is a reasoned or educated guess about a 1theory theory of a
scientific method -the scientific approach to explain a particular phenomenon require a series of organized steps based on common sense it is called
serendipidity -sometimes discoveries are made unexpectedly matter of chance this is serendipidity examples -1 structural
emergence of contemporary biology -1 aristotle 384-322bc - greekclassified animal species and arranged them in
medical science in ancient indiadhanvantri -god of medicineashvini kumar - famous medical man of vedic timessusruta - first indian to study human
difference between open system and closed system -snocharacteropen systemclosed system 1 relationship with environmentcan exchange the material
difference between plants and animals -s n o c h a ra c ter p l an tsa n i m al s1nutritionmostly
difference between living and non-living beings -s nocha ra cte rliving be ingsnon-living be
biology - a science of exception -some common examples to prove it are -1 embryos of dicot plants have 2 cotyledons but in
lifescience is originated from latin word scientia which means knowledgebiology is a branch deals with living beingsbiology word is originated from
modification of mitosis1 cryptomitosis or promitosis primitive type of mitosis in this mitosis nuclear membrane not disappear
human chromosomesthe normal diploid 2n chromosome number in human being is 46it was given by th tjio and a levan in 1956the chromosome complement of
supernumerary or accessory chromosomeswilson 1905 discovered them in matapodium insectvery small chromosomes present in nucleus in addition to normal
theories to explain fine structure of chromosome1 multistranded theorysteffenson 1959 - each chromosome composed of two chromatids half chromosome
karyotypeexternal morphology of chromosomes specific for each species of living organismskaryotype can be studied in metaphase of mitosiskaryotype
numberbenden and boveri first indicated that number of chromosomes is definite in each organism1 haploid n - one set of chromosomes ie one chromosome
chromosomeskarl nageli and hofmeister observed chromosomes in pollen mother cells of tradescantiachromosome name proposed by waldeyerduring cell
intermediate filamentsthese are non-living structuresmade up of different types of protein eg keratin synemin desmin and vimentinthese are divided
microfilamentsdiscovered by pelvitzthese are smallest cell structurethese are non-living structuresthese are solid structures consists of actin