Biology for ( Grade 10 )

8.1 (a) Control of Respiration : Respiration is controlled by the respiratory centre situated in medulla oblongata of brain. (i) ...

a sneezing. Fermentation : the slow decomposition of organic matter into simpler substances in the presence of enzymes is known ...

occurs (ix) O2 is utilized and CO 2 and H 2 O are formed C 6 H 12 O 6 + 6O 2 6O 2 + 6H 2 O + energy CO 2 and H 2 O are used whil ...

inabsence of O 2 in presence of O 2 Aneerobic respiration Aerobic respiration C 2 H 5 OH + CO 2 + 2 ATP Kreb Cycle CO 2 +H 2 O+3 ...

(vii) It starts with acetyl Co-A which is then converted into several intermediate compounds with the release of NADPH 2 , FDH 2 ...

two lungs in 100 S. m. In the cycle of inhalation and exhalation, repeated 15 to 18 times in a minutes about 500 ml of air is b ...

roughly 40% fewer oxygen molecules per breath. In order to oxygenate the body effectively, breathing rate (even while at rest) h ...

DAILY PRACTIVE PROBLEMS # 8 OBJECTIVE QUESTIONS Breathing rate in mammals in controlled by a part of the brain called the (A) ...

(C) in anaerobic and produces carbon dioxide (D) takes place only in darkness Muscle cells engaged in vigorous activity build u ...

LONG ANSWER TYPE QUESTIONS Write the differences between photosynthesis and respiration. Explain the following in brief : (a) ...

DAILY PRACTIVE PROBLEMS # 8 Qus. 1 2 3 4 5 6 7 8 9 10 Ans. C D A B B D C A A B ...

CONTROL & CO-ORDINATION 9.1 INTRODUCTION : All the living organisms show the irritability or sensitiveness. It is the proper ...

(phytohormones) co-ordination is present. 9.2 CHEMICAL CO-ORDINATION IN PLANTS : 9.2 (a) Movements in Plans : The plants are fix ...

(i) Shor day plants (ii) Long day plants (iii) Day neutral plants 9.2 (b) Vernalization and Flowering : The term vernalization w ...

Auxins are the growth hormones which were first discovered by Charls Darwin. Auxins are the weak organic acids which can promote ...

9.3 (b) Gibberallins : Gibberellins have a unique property of increasing the height of plants but they do not cause curvature. T ...

when Carlos Mille isolated the crystalline substance from degraded DNA material. This substance was named as kinetin. (i) Functi ...

bending. This results in the senescence in the plants. (D) Growth : It promotes transverse expansion but it inhibits longitudina ...

(F) Flowering and seed development : It is known to inhibit the process of flowering, fruit formation and seed development. 9.4 ...

stimulates the thyroid to produce its hormone; in turn the thyroid secretion induces the hypophysis to produce less thyroid stim ...