Exercise 1

Question 11 :

Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with

A). all gymnosperms, except conifers
B). only angiosperms
C). only conifers
D). angiosperms and all gymnosperms except conifers
Answer : Option C

Question 12 :

One of the following is not a function of bones.

A). Place for muscle attachment
B). Protection of vital organs
C). Secretion of hormones for calcium regulation in blood and bones
D). Production of blood corpuscles
Answer : Option C

Question 13 :

Plants absorb most part of water needed by them through their

A). embryonic zone
B). growing point
C). root hairs
D). zone of elongation
Answer : Option C

Question 14 :

Photo-oxidation is

A). photorespiration
B). photolysis
C). light and oxygen induced breakdown
D). All of the above
Answer : Option D

Question 15 :

Process of cell division can take place by

A). heterosis
B). fusion
C). mitosis
D). None of these
Answer : Option C