Yogy's biology

  1. Living World - part 03 - Museum,Zoological and biological Parks and key Museum : Museums are the places where,  collections of preserved plant and animal specimens  are kept.  Plant and animal specimens may be preserved in  formalin ( 10% to 40% formaledehyde) in transperent jars. Jars are  labelled.  Larger animals like birds and mammals are usually stuffed and preserved.This science is known as  taxidermy.  Specimens in dried form are also kept in museum. We can even find systematic collections of  shells, skeletons of animals, insect boxes  in museums. Thus, biological museums in educational institutes are reference hubs of biodiversity studies. Zoological Parks : Zoological Park generally known as  zoo , is a place of interest for common man. In a zoo,  wild animals are kept in captivity. They are protected and care is taken to provide conditions similar to their natural habitat. ( exsitu) In a zoo, a naturalist c...

  1. Living World - part 02 - Herbarium and Botanical Gardens Herbarium : The word herbarium (plural-herbaria) was coined by  Pitton de Tournefort  in the book ‘ Elemens ’.  The art of herbarium was initiated by an Italian taxonomist Luca Ghini  (1490-1556).  Herbaria are effective tools in taxonomic studies.  A herbarium is essentially  a dried plant specimen  that is pressed, treated and mounted on standard size sheet in order to preserve it. Date place of collection along with detailed classification  highlighting with its ecological peculiarities characters of the plant are recorded on the same sheet.  Local names and name of the collector may be added.  This information is given at lower right corner of sheet and is called  'label'. Botanical Gardens : Botanical gardens are the places where plants of different varieties collected from different parts of the world, are grown in a scientific and systematic in a  in...

1. Living World - part 01 - Basic principles of life Basic principles of life : 1. The living being once produced / born has to survive. For survival, it needs energy and many chemical molecules. For energy, it has to perform metabolism. Metabolism is breaking of molecules (catabolism) and making of new molecules (anabolism).2. From birth onwards, organisms show tendency of growth and development. This growth is a well-orchestrated process. You might have observed sand mounds, boulders grow, etc. This growth is not from within and hence these are not living beings.3. Growth and development are not the processes which have unlimited time span. At certain point of time, the molecules, organs, systems begin to loose their effective working and become old. This is ageing process of the body.4. Life has to continue hence the organism tries to produce a young one like itself. It is possible due to reproduction (asexual or sexual). This ensures continuity of race. Mules, sterile worker bees ...