Explanation: The pericycle, a layer of cells found just inside the endodermis of roots, is responsible for the initiation and development of lateral roots.
- Which of the following is NOT a function of parenchyma cells?
a) Photosynthesis
b) Storage
c) Structural support
d) Gas exchange
Answer: c) Structural support
Explanation: Parenchyma cells are primarily involved in storage, photosynthesis, and gas exchange. Structural support is mainly provided by sclerenchyma and collenchyma.
- The vascular bundles in dicot stems are arranged in:
a) A scattered manner
b) A ring
c) A radial manner
d) An irregular pattern
Answer: b) A ring
Explanation: In dicot stems, the vascular bundles are arranged in a ring, with xylem towards the inside and phloem towards the outside.
- Which of the following tissues is responsible for the increase in girth of the stem and root?
a) Apical meristem
b) Vascular cambium
c) Epidermis
d) Endodermis
Answer: b) Vascular cambium
Explanation: The vascular cambium is responsible for secondary growth, which increases the girth of stems and roots by producing secondary xylem and phloem.
- Which tissue is responsible for water transport in flowering plants?
a) Phloem
b) Xylem
c) Epidermis
d) Pericycle
Answer: b) Xylem
Explanation: Xylem is the vascular tissue responsible for transporting water and dissolved minerals from the roots to the leaves and other parts of the plant.
- The part of the leaf that is primarily involved in photosynthesis is the:
a) Mesophyll
b) Epidermis
c) Xylem
d) Phloem
Answer: a) Mesophyll
Explanation: Mesophyll cells in the leaf contain chloroplasts and are responsible for carrying out photosynthesis, converting light energy into chemical energy.
- In dicot roots, the xylem and phloem are arranged in:
a) A ring
b) A radial pattern
c) Scattered bundles
d) Concentric circles
Answer: b) A radial pattern
Explanation: In dicot roots, xylem and phloem are arranged in a radial pattern, with xylem in the center and phloem located between the arms of the xylem.
- Which of the following tissues is responsible for the conduction of food in plants?
a) Xylem
b) Phloem
c) Pericycle
d) Collenchyma
Answer: b) Phloem
Explanation: Phloem is responsible for the transport of food, primarily sugars produced during photosynthesis, from the leaves to other parts of the plant.
- Which tissue is responsible for the formation of wood in trees?
a) Primary xylem
b) Secondary xylem
c) Secondary phloem
d) Cork cambium
Answer: b) Secondary xylem
Explanation: Wood in trees is composed of secondary xylem, which is produced by the vascular cambium during secondary growth.
- Which part of the plant contains the Casparian strip?
a) Root hair
b) Endodermis
c) Cortex
d) Pericycle
Answer: b) Endodermis
Explanation: The Casparian strip is found in the endodermis of roots and regulates the flow of water and nutrients into the vascular system.
- Which type of meristem is found at the growing tips of stems and roots?
a) Lateral meristem
b) Apical meristem
c) Intercalary meristem
d) Vascular cambium
Answer: b) Apical meristem
Explanation: Apical meristems are located at the tips of stems and roots and are responsible for primary growth, which increases the length of the plant.
Leave a comment