289. The sea horse is an example of:
(a) fishes class
(b) mammals class
(c) reptiles class
(d) mollusc class
Ans: (a)
290. Which of the following is a real fish? [UPPCS (Pre) 2004]
(a) cray fish
(b) flying fish
(c) cuttle fish
(d) silver fish
Ans: (b)
291. An artificial kidney works on the principle of:
(a) diffusion
(b) osmosis
(c) dialysis
(d) active transportation
Ans: (c)
292. Which one among the following nontoxic gases helps in formation of enzymes which ripen fruit?
(a) Acetylene
(b) Ethane
(c) Methane
(d) Carbon dioxide
Ans: (a)
293. The terrestrial species of Echinodermata are :
(a) brittle - star
(b) starfish
(c) sea-lily
(d) None of these
Ans: (d)
294. The most significant stimulant in the tea leaves is :
(a) brucine
(b) caffeine
(c) phenylalanine
(d) theine
Ans: (b)
295. The fishes are assumed to be healthy and more nourishable with comparison to another flesh animals because in
the fish: [IAS (pre) 1999]
(a) there exists multi unsaturated acid
(b) there exists saturated fatty acid
(c) there exists necessary vitamins
(d) there exists more carbohydrate and protein
Ans: (a)
296. All living organisms are single eelled in their earliest history of life. Which of the following is an example of such a
cell ?
(a) Ovum
(b) Sperm
(c) Spermatocyte
(d) Zygote
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