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history of ecologythe roots of ecology lie in natural history which is as old as human civilisation itself as a matter of fact man indulged in
ecologyvery often a word has a precise well-defined meaning in scientific literature but is loosely used in everyday language it is therefore
microbodiesperoxisomes and glyoxysomes are microbodies formed from er which superficially resemble the lysosomes peroxisomes are spherical bodies
endocytosis and exocytosisendocytosis is the process by which substances are brought into the cell from outside by formation of membrane bound
polymorphism in lysosomespolymorphism ie existence of a structure in more than one form is an important feature of lysosomes several different forms
recycling of plasma membrane componentsduring exocytosis secretory vesicles fuse with plasma membrane adding to the membrane surface area yet the
rough and smooth endoplasrnic reticulum rer and serer is differentiated into two regions granular or rough endoplasrnic reticulum rer and agranular
cinemicrographyearlier it was impossible to follow the evenvts within the cell due toi non-visibility of cell organelles under a light microscopeii
tissue cultureit is an important technique for maintaining apm or piece of animal or plant tissue alive after their culture dishes it is necessary to
autoradiographyautoradiography is a modification of the radioactive tracer technique in this technique the radioactivity is detected by a thin film
radioisotopesradioisotopes are those forms of an element which exhibit rzdioactivity and so can be used as markers or tracers for this purpose we
scanning electron microscopy semwhile tem is useful to study the internal structul-c of thc ccll sem is an important technique if you wish to examine
transmission electron microscopythe source of illumination in a tem is a tungsten filament that emits electrons a vacuum is created to prevent the
electron microscopy emin em the object is viewed by a beam of electrons instead of visible light an electron beam has a shorter wadelength h 0004 nm
fluorescence microscopycertain compounds when exposed to short wavelength radiations eg uv and x-rays absorb and emit energy as light of a longer
cytochemistryit is well known that certain stains and dyes specifically combine with certain chemical components of the cell cytochemical techniques
how cells are studiedwe learnt about the evolution of the cell and a historical account of the growth of cell biology in this section you will study
mitochondria mitochondria are commonly known as the power house of cells these are the distinct organelles of all eucaryotic cells plants fungi and
procaryotes to eucaryotesprocaryotes are the simple unicellular organisms which do not have well defined nucleus whereas eucaryotes are the
evolution of photosynthesis and aerobic respirationit is assumed that the earlier form of the bacteria utilised h2s for the preparation of food the
what benefits led to natural selection of a two-circuit pump function of the heart aone circuit to go from the heart to the body and one from
eubiontthe origin of true life eubiont from a pmtobiont involves the acquisition of three major features1 assembly of phospholipids and proteins
evolution of the cellall the living organisms are made up of cells a living cell may be defined as a compartment enclosed by a membrane that consists
introduction to cell biologyintroduction to cell biology illustrate about the evolution of the cell that involves two processes1 occurrence of
explain the relationship between the terms induceractivation transcription