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Active transport is the transport of the molecules against the concentration gradient (from area of low concentration to area of high concentration) with the help of proteins in the cell membrane and energy from ATP.
Q. Besides being fundamental for the activation of the main gastric digestive enzyme how does HCl also directly participate in digestion? With its corrosive effect HCl also hel
Is transportation of gases in tracheophytes made through the vascular tissues? Carbon dioxide and oxygen are not transported by the xylem or phloem. These gases reach the cells
Define Reagents for Measurement of pH? Buffer solutions of pH 4, pH 7 and pH 9.18 for calibration and an unknown solution (i.e. solution of unknown pH) You can prepare these
The scientist who described cells as “many little boxes” was
EXCRETIO N IN FLATWORM - Main organs are flame cells, having bundle of cillia. It receives solute and water from surrounding tissue fluid by ultra filtration & discharge th
What is a centimorgan? Centimorgan, or recombination unit, by convention is a distance among two linked genes that corresponds to 1% of recombination frequency of these genes.
origin of species
Action potentials include changes in the membrane potential of an axon, as shown in the schematic below. During the refractory period, sodium channels are inactivated and
Vital Dye Staining In this type of method, a piece of agar or cellophane soaked in the solution of a vital dye (Neutral Red, Nile Blue Sulphate, and Bismarck Brown etc.) is a
Wind energy Wind power is one of most cheapest renewable energy sources today. Wind turbines convert the power of wind into electrical energy. Wind occurs due to t
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