The life span of red blood cell is
A) 130 days
B) 120 days
C) 12 – 13 days
D) 115 days
1 Answers
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300 men can construct a200m long wall in 12 days working 8 hours a day. In how many days can 120 men construct 180 m long wall working 9 hours per day
\(\frac{M_1D_1H_1}{W_1}=\frac{M_2D_2H_2}{W_2}\) M1 = 300, D1 = 12, H1 = 8, W1 = 200 M2 = 120, D2 = ? H2 = 9, W2 = 180 \(\frac{300\times12\times8}{200}=\frac{120\times D\times7}{180}\) D = 24 days
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An urn contains 9 red, 7 white and 4 black balls. A ball is drawn at random. Find the probability that the ball drawn is (i) red (ii) white (iii) red
Correct Answer - `(i) 9/20 (ii) 7/20 (iii) 4/5 (iv) 11/20 (v) 13/20`
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The Red blood cells have less life span because
C) absence of nucleus
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Red blood cells are red in colour due to the presence of A) haemoglobin B) fibrinogen
A) haemoglobin
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‘Pus’ is formed by A) Red blood cells B) White blood cells
B) White blood cells
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Number of red blood cells present in 1 ml of blood
Correct option is B) 5 millions
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Red blood cells: Erythrocytes:: White blood cells: ? A) Leucocytes
Correct option is A) Leucocytes
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Life span of a queen bee is
(C) 2 – 3 years
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1. A cell is the smallest unit of life. 2. Nerve cell is the longest cell. 3. Prokaryotes were the first form of life on earth
1. True 2. True 3. True 4. True 5. True
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A,B and C can do a work in 20,45 and 120 days respectively.They started the work. A left 10 days before and B left 5 days before the completion of wor
Correct Answer - 20
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