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Q. How different are gymnosperms from pteridophytes and bryophytes?
Gymnosperms are not cryptogamic as pteridophytes and bryophytes are. They are phanerogamic and so they form seeds and flowers.
A device called a hemocytometer is often used to estimate the number of cells in a culture. Cells are suspended in fluid. A small volume of the fluid is placed into a special chamb
Explain about the Colorimeter? Colorimeter is an instrument for measuring the colour or colour intensity of a solution. It is an instrument that measures the concentration of a
how conjugation takes place in paramecium
What is Specific defence mechanism Specific: These relate to specialized cells located throughout the body which respond to invasion of foreign materials/microorganisms su
What is Phylum Porifera in Classification of the Animal King? Sponges are the simplest form of animals. Their bodies are not organized in any specific pattern other than masses
What are the chemical elements that form most of living biological matter? The elements are:- a) oxygen (O), b) carbon (C), c) hydrogen (H) and d) Nitrogen (N).
what is ecological pyramids
EXAMPLES OF NATURAL SELECTION - 1 . INDUSTRIAL MELANISM - First studied by Fischer & Ford (1845) on pepperd moth (Biston betularia) of two types : grey moth (B.
Unlike the phagocytosis, that is a regulated form of endocytosis carried out by a small number of cell category, pinocytosis is a constitutive process which happens continuously in
Dengue Dengue fever is a viral disease transmitted by mosquito bites that occurs worldwide in tropical and subtropical areas. Major epidemics have occurred in recent years in
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