(a) spread of solid tumour
(b) bone density
(c) ulcerous growth in stomach
(d) extent of brain haemorrhage
42 Q) The virus was discovered by
(a) Urey
(b) Haeckel
(c) Smith
(d) Ivanowski
I. It is formed by the palisade and spongy mesophyll.
II. It is a form of parenchyma, which contains chloroplasts.
III. It serves to transport organic solutes made by photosynthesis.
IV. It is a thin transport layer, which has chiefly a protective function. Which of the statements given above is/are correct?"
(a) I and II
(b) I, II and III
(c) II and IV
(d) Only I
44 Q) "Assertion (A) Vitamin K is given for the blood coagulation.
Reason (R) It helps in the synthesis of fibrinogen in liver."
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are 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
45 Q) Organisms free floating on the surface of water body are
(a) benthos
(b) nektons
(c) neustons
(d) phytoplanktons
46 Q) Ecdysone is secreted by
(a) moluscs
(b) birds
(c) reptiles
(d) insects
47 Q) The fossil of Arxhaepteryx represents the evidence of origin of
(a) birds from reptiles
(b) mammals from reptiles
(c) reptiles from amphibians
(d) mammals from birds
48 Q) In sharks, there are
(a) 4 pairs of gills covered by operculum
(b) 4 pairs of gills without operculum.
(c) 5 7 pairs of gills with operculum.
(d) 5 7 pairs of gills without operculum
49 Q) The colour of the bile pigment is largely derived from
(a) undigested food
(b) breakdown of haemoglobin from worn-out cells
(c) xanthophylls
(d) bile salts
50 Q) Which of the following island is known as "Biological paradise"?
(a) Madagascar island
(b) Sandwich island
(c) St Helena island
(d) Galapagos island
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