Biology for ( Grade 10 )

16.17 WEISMANN : Weismann cut off tails of rats for about twenty two generations but there is no reduction in the size of the ta ...

DAILY PRACTICE PROBLEMS # 16 OBJECTIVE QUESTIONS Which one of these is likely to have been absent in free form at the time of o ...

but similar function (C) structurally as well as functionally similar (D) normally non-functional Analogous organs are those wh ...

(C) the fossa present in the bones (D) foramens through which nerves pass An experiment to prove that organic compounds were th ...

Origin of life is due to (A) spontaneous generation (B) God’s will (C) effect of sun rays on mud (D) chemical evolution SUBJEC ...

DAILY PRACTIVE PROBLEMS # 16 Que. 1 2 3 4 5 6 7 8 9 10 Ans. A B D C B A B A B D Que. 11 12 13 14 15 16 17 18 19 20 Ans. D C B B ...

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Subject : Biology Class : X (CBSE ) CONTENSTS S.No. Topics Page No. 1. Nutrition 2 - 18 2. Transportation & Excretion 19 - 3 ...

NUTRITION 1.1 NUTRITION : “Nutrition” is a process of intake as well as utilization of nutrients by an organism. It is the proce ...

food. 1.2 (a) Autotrophic : (Auto = self, trophic = food) It is a mode of nutrition in which organisms prepare their own food. I ...

Amoeba, human etc. (ii) Saprotrophic : they absorb organic matter from dead and decaying organisms with the help of their enzyme ...

Plants utilize the light in the visible region of solar spectra (electromagnetic spectrum) which comes under the range of 390 n ...

atmosphere through the small openings present on leaves called as stomata. ‘Stomata’ are the small pores present on the surface ...

In higher plants chloroplast in the main site of photosynthesis. Chloroplast is also called as green plastid. Plastid was first ...

- A typical structure of chloroplast is a double membranous structure having two parts. (i) Grana : It is a lamellar system co ...

are 40 - 60 per cell. Number of thylakoids per grana is 50 or more Chlorophyll molecules are found inside the thylakoid membrane ...

O 2 is liberated as by product and H+ ions are used for reduction of NADP 2NADP + 4H+ 2NADPH 2 (C) Photophosphorylation : During ...

Normally plants utilize sunlight but marine algae can perform photosynthesis even in the moon light. Plants can also perform pho ...

following significance : (i) Production of food material (ii) Atmospheric control and purification of air. ...

DAILY PRACTIVE PROBMES # 1 OBJECTIVE QUESTION The raw materials for photosynthesis are (A) CO 2 & O 21 (B) sunlight and CO ...