- Global climate is threatened by increase in concentration of
(a) Oxygen
(b) Nitrogen
(c) Water vapours
(d) Green house gas Spraying of D.D.T. on crops produces pollution of
(a) Air only
(b) Air and soil only
(c) Air, soil and water
(d) Air and water onlyVitamin B12 contains metal
(a) Ca (II)
(b) Zn (II)
(c) Fe (II)
(d) Co (III)The separation technique which involves the difference in their densities is
(a) sublimation
(b) separation by separating funnel
(c) centrifugation
(d) both (b) and (c)Pick up the odd one out
(a) Brass
(b) Air
(c) Sand
(d) GraphiteIn multicellular organisms, _____ refers to the production of progeny possessing features more or less similar to those of parents.
(a) growth
(b) reproduction
(c) metabolism
(d) consciousnessHeart is three – chambered in reptiles, exception is
(a) Turtle
(b) Chameleon
(c) Naja (Cobra)
(d) CrocodileStem tendrils are found in
(a) cucumber
(b) pumpkins
(c) grapevines
(d) All of theseThe supportive skeletal structures in the human external ears and in the nose tip are examples of
(a) ligament
(b) areolar tissue
(c) bone
(d) cartilageBuilding block of nucleic acid is
(a) nucleotide
(b) nucleoside
(c) amino acid
(d) fatty acid
You must log in to post a comment.