Secondary Growth
Trending Questions
Q.
Demonstrate an experiment to show that water is conducted by xylem.
Q. Read the different components from (a) to (d) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem:
(a) Secondary cortex
(b) Wood
(c) Secondary phloem
(d) Phellem
The correct order is:
(a) Secondary cortex
(b) Wood
(c) Secondary phloem
(d) Phellem
The correct order is:
- (d), (c), (a), (b)
- (c), (d), (b), (a)
- (a), (b), (d), (c)
- (d), (a), (c), (b)
Q. On the trunk of a 25-year-old tree, a marking was made 50 cm above the soil level. Assuming that the growth rate of the tree is 50 cm/ year, at how much distance above soil level will the marking be seen after 3 years?
- 50 cm
- 1 m
- 1.5 m
- 2 m
Q. Fusiform initial forms
- vascular rays
- ray parenchyma
- tracheary elements
- primary phloem
Q. How many of the following statement(s) is/are correct regarding secondary growth?
A. Secondary tissues are formed from lateral meristems.
B. Gymnosperms show secondary growth.
C. Periderm is a secondary tissue that helps in secondary growth.
D. Because of the presence of vascular cambium, secondary growth does not occur in monocots.
A. Secondary tissues are formed from lateral meristems.
B. Gymnosperms show secondary growth.
C. Periderm is a secondary tissue that helps in secondary growth.
D. Because of the presence of vascular cambium, secondary growth does not occur in monocots.
- One
- Two
- Three
- Four
Q. The origin of vascular cambium is completely secondary in
- dicot stem
- monocot stem
- dicot root
- monocot root
Q. Which of the following statements is not true about secondary growth?
- It leads to an increase in the girth of a plant
- It occurs in dicotyledonous plants and gymnosperms
- Redifferentiation of medullary ray cells form cambium
- It adds new conducting tissue to meet the increased demand for food and water
Q. Plants having little or no secondary growth are
- conifers
- deciduous angiosperms
- grasses
- cycas
Q. Secondary growth is seen only in monocots.
- False
- True
Q.
Secondary growth is initiated by ______
Xylem
Phloem
Cambium Ring
Pith
Q.
Which of the following is not a product of secondary growth activity of a plant?
Pith
Heartwood
Cork
Lenticel
Q.
Secondary growth does not occur in monocots as their vascular bundles are
Closed
Scattered
Radial
Enclosed by sclerenchyma
Q.
Secondary growth is initiated by ______
Xylem
Phloem
Cambium Ring
Pith
Q. Apical dominance means ______.
- Suppression of growth of apical buds by the axillary buds
- Suppression of growth of axillary buds by the presence of apical buds
- Stimulation of a growth of apical buds by the removal of axillary buds
- Inhibition of growth of axillary buds by the removal of axillary buds
Q. Secondary xylem is thicker than secondary phloem since cambium is more active inside than outside.
- False
- True
Q.
Which of the following is not a product of secondary growth activity of a plant?
Heartwood
Cork
Pith
Lenticel
Q. In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues:
- Stem and root
- All parts
- Branches
- Flowers, fruit and leaves