Which of the following is responsible for the radial growth of plants?
Apical meristem
Intercalary meristem
Lateral meristem
Parenchyma
Related Questions
Which season corresponds to the period of reduced cambial activity and the formation of late wood?
Spring
Summer
Autumn
Winter
Large number of xylary elements having vessels with wider activity are produced in
Tropical trees
Temperate trees
Shrubs
Herbs
A researcher studying secondary growth in a dicot stem observes a peculiar pattern. The vascular cambium appears to be producing more xylem towards the center than phloem towards the periphery. Which of the following factors is LEAST likely to contribute to this unusual observation?
Hormonal imbalances
Environmental stress
Genetic mutation
Seasonal variations
Alburnum is otherwise known as
Periderm
Sapwood
Heartwood
Bark
Identify the incorrect statement.
Heart wood does not conduct water but gives mechanical support
Sapwood is involved in conduction of water and minerals from root to leaf
Sapwood is the innermost secondary xylem and is lighter in colour
Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
Select the wrong statements
I. Primary and secondary phloem gets crushed during secondary growth
II. During secondary growth, primary xylem remains more or less intact
Only I
Only II
Both I and II
None of the statements are wrong
Lenticels are mainly involved in?
Food transport
Photosynthesis
Transpiration
Gas exchange
Which of the following is NOT a function of the periderm?
Protection against desiccation
Protection against mechanical injury
Protection against pathogens
Conducting water and minerals
I. The 1Β° and 2Β° phloem get gradually crushed due to the continued formation and accumulation of 2Β° xylem
II. 1Β° xylem remains more or less intact in or near the centre
III. Secondary growth results in an increase in the length of the axis
Select the correct statements
I and II
II and III
I and III
I, II and III
Arrange the following tissues from outermost to innermost in a woody dicot stem:
(a) Secondary xylem
(b) Phellem
(c) Secondary phloem
(d) Secondary cortex
(a), (b), (c), (d)
(b), (d), (c), (a)
(d), (b), (a), (c)
(c), (a), (b), (d)