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EXCRETION IN FLATWORM -
Main organs are flame cells, having bundle of cillia.
It receives solute and water from surrounding tissue fluid by ultra filtration & discharge the filtrate into nephredial ducts.
Here reabsorption occur. Excretory material are given out through excretory pore.
EXAMPLES OF NATURAL SELECTION - 1 . INDUSTRIAL MELANISM - First studied by Fischer & Ford (1845) on pepperd moth (Biston betularia) of two types : grey moth (B.
when pollen tube enters the embryo-sac,it has;
Cell wall is the structure produced by some of the cells outside their cell membrane; variously composed of the chitin, peptidoglycan, or cellulose.
WHY CONSERVE WILD LIFE ? 1 . ECONOMIC IMPORTANCE OF WILD LIFE - (i) Plants - (ii) Animals - (iii) Micro organisms - 2 . ECOLOGICAL BALANCE -
Define the Over nutrition obesity of Infant? An infant is never put on a reducing diet. The chances of obesity are least if an infant is exclusively breast-fed till 6 months. I
What are the constituent elements of the blood? The blood is made of a liquid and a cellular part. The fluid part is known as plasma and in it there are several substances, suc
Define the Fehling's Soxhlet method (Lane-Eynon method)? This is a titrimetric method that is commonly used in food laboratories to estimate percentage of reducing sugars and t
State the term - Molybdenum Molybdenum is intimately related to nitrogen metabolism of plants. It is part of the nitrate reductase system which helps to utilise nitrate for n
Q. How Time affecting taste quality? Time- Time is another factor which affects sensation. Salt on tongue is sensed in a fraction of a second; whereas, bitter things may requir
Where in the body is the thyroid gland located? The thyroid is located in the anterior cervical region (frontal neck), in front of the trachea and just below the larynx. It is
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