How do the following effect the land resource. (a) deforestation (b) safety way for using Agrochemical (c) Ill effects to land by pesticides (d) By using excessive amount of chemical fertilizer € compost manure.

List the harmful effects of the following pollutant: Chemical fertilizers used in agriculture

Which of the following statement is/are correct? (a)Three coins are tossed once. At least two of them must land the same way. No matter whether they land heads or tails, the third coin is equally likely to land either the same way or oppositely. So, the chance that all the three coins land the same way is 1/2. (b)Let 0 (c)Suppose urn contains "w" white and "b" black balls and a ball is drawn from it and is replaced along with "d" additional balls of the same color. Now a second ball is drawn from it. The probability that the second drawn ball is white is independent of the value of "d"dot (d) A ,B ,C simultaneously satisfy P(A B C)=P(A)P(B)P(C) P(A B C )=P(A)P(B)P( C ) P(A B C)=P(A)P( B )P(C) P(A-B C)=P( A )P(B)P(C) Then A ,B ,C are independent

Which are true about the following statements about kangaroo rats (a) They have dark colour, high rate of reproduction and excrete solide urine (b) They do not drink water, breathe at slow rate, and have their body covered with thick hair (c) The feed on dry seeds and do not require drinking water (d) They excrete very concentrated urine and do not use water to regulate body temperature

Carbohydrates are commonly found as starch in plant storate organs. Which of the following five properties of starch (A-E) make it useful as a storage material? A. Easily translocated B. chemically non-reactive. C. easily digested by animals D. osmotically inactive E. synthesised during photosynthesis The useful properties are:-

Study statement a-d (about organic farming) and find out the correct ones. (a) Utilises genetically modified crops like Bt cotton (b) Uses only naturally produced input like compost (c) Does not use pesticide and urea (d) Produces vegetables rich in vitamins and minerals

Answer briefly : (a) How do you perceive the colour of an object ? (b) Which part of our body helps us in maintaining the body balance ? (c) How does the eye regulate the amount of light that falls on the retina.

The tyndall effect is observed only when following conditions are satisfies- (a) The diameter of the dispersed particles is much smaller than the wavelength of the light used. (b) The diameter of the dispersed particle is not much smaller than the wavelength of the light used. (c)The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude. (d) The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

Figure shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions . (a) At which point /s (A,B or C) in the curve is light a limiting factor ? (b) What could be the limiting factor/ s in region A ? (b) What could be the limiting factor /s in region A ? (c) What do C and D represent the following .