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The percentage of oxygen absorbed from the air in the lungs is always about the similar, so how can the oxygen supply to the blood be enhanced during vigorous activity?
Breathing becomes deeper and more rapid, thus exposing the capillaries to a greater volume of air in a given time.
What is Photosynthesis ? Photosynthesis is the method by which plants trap radiant energy from the sun and convert the energy into a biochemical form. This biochemical energy
Heart of cockroach: In cockroach, heart is situated in pericardial sinus. It has13 chambers These are one behind the other. Each chamber opens into preceeding one. The
Q. What is the evolutionary importance of pteridophytes? As the first pteridophytes, tracheophytes were also the first plants to extensively colonize the terrestrial environmen
Hydrophilic and some lipophilic hormones bind to cell surface receptors. These are necessary membrane proteins located in the plasma membrane which bind the signaling mol
Define Conjugation in brief. A form of sexual reproduction in ciliates (Ciliophora). During conjugation two ciliate protozoans join and macronuclei disappears. After meiotic d
Q. What are the subkingdoms into which the plant kingdom is divided? The kingdom Plantae is divided into two big subkingdoms: the tracheophytes and the bryophytes (gymnosperms,
Q. Symptoms of Angina Pectoris? The pain of angina is usually over the center of the chest (below the sternum) but can be felt from epigastrum to the jaw and arms. It is brough
What is the minimum sample weight, at USP standards (U = 0.1% and k = 3), that can be measured on an analytic balance in which the repeatability is 0.0001 g. Include the uncertaint
Define The Names of Some Immemorial Plants? From the time immemorial plants have been known by some name, they are common, vernacular or local names given by different persons.
Q. Minerals requirements during congestive cardiac failure? Minerals: Since sodium and potassium are the major electrolytes associated with oedema, it is important that sodium
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