9
Question
Growth rings are either absent or are not sharply demarcated in
Growth rings are either absent or are not sharply demarcated in
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Solution
The correct option is A Tropical evergreen trees
The cambial activity is seen in the
temperate trees in two seasons of the year. In the spring season, the vessels
are broader as more water is needed to meet the requirement by increased
transpiring surface, thus a light-coloured broad zone of springwood or earlywood
is formed. The autumn season brings leaf fall in deciduous trees.
Thus the
water requirement is reduced and hence, narrow vessels having darker contents
are formed. As a result, a dark-coloured narrow band of an autumn wood or
latewood is formed. The two woods jointly constitute the annual ring or growth
ring.
Answer B is correct.
The cambial activity is seen in the temperate trees in two seasons of the year. In the spring season, the vessels are broader as more water is needed to meet the requirement by increased transpiring surface, thus a light-coloured broad zone of springwood or earlywood is formed. The autumn season brings leaf fall in deciduous trees.
Thus the water requirement is reduced and hence, narrow vessels having darker contents are formed. As a result, a dark-coloured narrow band of an autumn wood or latewood is formed. The two woods jointly constitute the annual ring or growth ring.
Answer B is correct.
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