2521: Biofilms are
(a) colour films used by biologists to photograph living organisms
(b) photomicrographs of microorganisms from various habitats
(c) accumulations of microorganisms at surfaces such as those of a rock, a tooth or an oil droplet
(d) photographic films made through fermentation processes of certain industrial microorganisms
2522: Assertion (A) : There are no tea plantations in any African country.
Reason (R) : Tea plants need fertile soil with high humus.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
2523: Projects and Development India Limited is Mainly engaged is design engineering, procurement and supervision of construction/commissioning in which area?
(a) Pharmaceutical plants
(b) Petroleum refineries and sugar factories
(c) Ship-building yards
(d) Fertilliser and allied chemical plants
2524: Ogaden region has been a source of conflict between which countries?
(a) Angola and Zambia
(b) Morocco and Algeri
(c) Ethiopia and Somalia
(d) Nigeria and Cameroon
2525: Match List-I with List-II and select the correct answer using the code given below the lists :
List-I (Town) : List-II( River Nearer to it)
A. Betul : 1. Indravati
B. Jagdalpur : 2. Narmada
C. Jabalpur : 3. Shipra
D. Ujjain : 4.Tapti
(A) 4 1 3 2
(B) 1 4 2 3
(C) 1 4 3 2
(D) 4 1 2 3