2886: 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
2887: Recently, linking of which of the following rivers was undertaken?
(a) Cauvery and Tungabhadra
(b) Godavari and Krishna
(c) Mahanadi and Sone
(d) Narmada and Tapti
2888: Match List I with List II and select the correct answer using the codes given below the Lists :
List I------------------------List II
(Persons)----------------------(Journals)
I. Shyamji Krishna Varma------(A) Bande Mataram
II. Madame Bhikaji Cama-------(B) Indian Sociologist
III. Annie Besant--------------(C) The Talwar
IV. Aurobindo Ghosh-----------(D) Commonweal
Codes:
(a) I-B, II-C, III-D, IV-A
(b) I-C, II-B, III-A, IV-D
(c) I-B, II-C, III-A, IV-D
(d) I-C, II-B, III-D, IV-A
2889: The release of which one of the following into ponds and wells helps in controlling the mosquitoes?
(a) Gambusia fish
(b) Snail
(c) Crab
(d) Dogfish
2890: In the context of genetic disorders, consider the following:
A woman suffers from colour blindness while her husband does not suffer from it. They have a son and a daughter. In this context, which one of the following statements is most probably correct?
(a) Both children suffer from colour blindness.
(b) Daughter suffers from colour blindness while son does not suffer from it.
(c) Both children do not suffer from colour blindness.
(d) Son suffers from colour blindness while daughter does not suffer from it.