(b) have increased number of red blood cells in their body
     (c) have too much acid in their blood
     (d) are given vitamin B complex to regain the loss of body weight
Ans: (c)
326. Which of the following is correct for tea?
     (a) Acidic and caffeine
     (b) Alkaline and caffeine
     (c) Acidic and nicotine
     (d) Alkaline and nicotine
Ans: (b)
327. Tetracycline is used: [UP PCS 1994]
     (a) for air purification
     (b) as a pest killer
     (c) as anti-plague drug
     (d) as a preservative
Ans: (c)
328. The practice of transplantation is used in cultivation of which of following crops?
     1. Jowar
     2. Rice
     3. Tomatoes
     4. Chillies
     (a) 1 and 2
     (b) 2 and 3
     (c) 1, 2 and 3
     (d) 2, 3 and 4
Ans: (d)
329. Which of the following are characteristics of high yielding varieties of crops?
     1) High yield
     2) Dwarfness
     3) Require less frequent weeding
     4) More prone to diseases
     (a) 1, 2 and 3
     (b) 1, 3 and 4
     (c) 1, 2 and 4
     (d) 1, 2, 3 and 4
Ans: (c)
330. Which of the following is adapted to grow in dry places? [CDS 1990]
     (a) Hydrophytes
     (b) Heliophytes
     (c) Xerophytes
     (d) Sciophytes
Ans: (c)
331. Plant identical to mother plant" can be had from:
     (a) seeds
     (b) stem cutting
     (c) Both of these