881: Identical twins are born when:
(a) Two sperms fertilise one ovum
(b) Two sperms fertilise two ovums simultaneously
(c) One sperm fertilises the ovum and zygote divides into two separate cells developing independently
(d) One sperm fertilises two ovums
882: Match List I with List II and select the correct answer by using the codes given below the lists :
List I-------List II
I. Malaria------- (A) Bone marrow
II. Filaria------- (B) Brain
III. Encephalitis------- (C) Muscle
IV. Leukaemia------- (D) Lymph node
-------------- (E) Blood cells
Codes:
(a) I-E, II-C, III-B, IV-A
(b) I-E, II-D, III-B, IV-A
(c) I-D, II-C, III-E, IV-A
(d) I-E, II-D, III-A, IV-B
883: Consider the following provinces of former Yugoslavia :
I. Bosnia
II. Croatia
III. Slovenia
IV. Yugoslavia.
The correct sequence of these provinces from the east to the west is
(a) IV, I, III, II
(b) IV, I, II, III
(c) I, IV, III, II
(d) I, IV, II, III
884: A lot of details, regarding the village administration under the Cholas is provided by the Inscriptions at
(a) Thanjavur
(b) Uraiyur
(c) Kanchipuram
(d) Uttaramerur
885: The resolving power of an electron microscope is much higher than that of an ordinary light microscope because resolving power increases:
(a) If wavelength is short and wavelength of electron beam can be made quite small by accelerating the electrons.
(b) If wavelength is short and light given by electrons has very short wavelength.
(c) If magnification is high and electronic lens provides much higher magnification.
(d) If magnification is high and the electron microscope has a battery of lenses to provide high magnification.