Which structure protects the plant body against the invasion of parasites?
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Which of the following does not lead to the spread of democracy? (a) Struggle by the people (b) Invasion by foreign countries
(b) Invasion by foreign countries
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Internal fertilization occurs Option A: in female body. Option B: outside female body. Option C: in male body. Option D: outside male body.
Correct Option: A Internal fertilization occurs inside female body
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In the following statements, tick ‘T’ against those which are true and ‘F’ against those which are False.
(a) True (b) False (c) False (d) True (e) False (f) False (g) True
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Out of zinc and tin, which one protects iron better even after cracks and why ?
Zinc protects better because oxidation of zinc is greater but that of tin is less than that of iron.
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Put a tick (√) against the garbage items given in Table 16.1 which could be converted into manure. Put a cross (×) against the others.
Tick (√) against i, ii, iii, viii, x Cross (×) against iv, v, vi, vii, ix
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How ozone protects the eco system ?
The ozone layer ward off harmful ultraviolet radiations from the sun and thus protects the living organisms nut if this layer gets depleted than the ultra violet radiations will directly...
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Tick the correct answer: (i) Which of the following gases protects us from harmful sun rays? (a) Carbon dioxide
(i)—(c), (ii)—(a), (iii)—(b), (iv)—(b), (v)—(b).
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What is the coordination number of atoms: i. in a cubic close-packed structure? ii. in a body-centred cubic structure?
i. The coordination number of atoms in a cubic close-packed structure is twelve. ii. The coordination number of atoms in a body-centred cubic structure is eight.
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Percentages of free space in cubic close packed structure and in body centred packed structure are respectively.
(c) : The packing efficiency in a ccp structure = 74% Therefore, Percentage free space = 100 – 74 = 26% Packing efficiency in a body centred structure = 68% Therefore, Percentage free...
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Which of the following gases protects us from harmful sun rays?
The correct answer is (c) Ozone.
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