3546: Where it the volcanic mountain, Mount St. Helens located?
(a) United States of America
(b) Japan
(c) Philippines
(d) Chile
3547: The varieties of corn can be improved by which of the following methods?
(a) Dihybrid cross
(b) Back cross
(c) Double cross
(d) Natural selection
3548: The yield versus fertilizer input is shown in the graph.
Consider the following statements based on this graph :
I. Yield rate is zero at B and C.
II. There is no yield with no fertilizer input.
III. The yield is minimum at D.
IV. The yield is neither minimum nor maximum at C.
Which of the above statements are correct ?
(a) I, II and IV
(b) III and IV
(c) II and III
(d) I, III and IV
3549: The Indian national movement became organised for the first time in
(a) 1885
(b) 1857
(c) 1905-06
(d) 1916-17
3550: Which one among the following rivers is the longest?
(a) Lena
(b) Congo
(c) Amur
(d) Amazon