Anatomy of Flowering Plants Chapter-Wise Test 7

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about phloem is incorrect?

Phloem transports food from source to sink.
Sieve tube elements have companion cells to support their function.
Phloem contains xylem vessels.
Phloem fibers provide mechanical strength.
3

Phloem does not contain xylem vessels; instead, it consists of sieve tubes, companion cells, phloem fibers, and phloem parenchyma.

Which type of simple permanent tissue makes up the majority of the cortex in dicot roots?

Collenchyma
Sclerenchyma
Parenchyma
Xylem
3

The cortex of dicot roots consists mostly of parenchymatous cells, which store food and provide structural support.

What is the primary function of the pericycle in dicot roots?

Initiation of lateral roots
Absorption of water
Gas exchange
Photosynthesis
1

The pericycle in dicot roots plays a crucial role in the initiation of lateral roots and secondary growth.

Which type of plant tissue consists of actively dividing cells?

Parenchyma
Collenchyma
Meristematic tissue
Sclerenchyma
3

Meristematic tissue consists of actively dividing cells that contribute to plant growth.

Which cells in the vascular bundle provide structural support?

Xylem vessels
Sclerenchyma fibers
Companion cells
Phloem parenchyma
2

Sclerenchyma fibers in vascular bundles provide mechanical strength and support to plants.

Which structure in dicot stems lies between the vascular bundles and helps in lateral conduction?

Medullary rays
Cortex
Pith
Epidermis
1

Medullary rays in dicot stems are parenchymatous cells that facilitate lateral conduction of nutrients and water.

Which layer of the dicot stem is rich in starch grains and is also called the starch sheath?

Endodermis
Pericycle
Epidermis
Cortex
1

In dicot stems, the endodermis is rich in starch grains and is referred to as the starch sheath.

Which characteristic differentiates monocot stems from dicot stems?

Presence of hypodermis
Scattered vascular bundles
Ring arrangement of vascular bundles
Presence of hypodermis
2

Monocot stems have vascular bundles scattered throughout the ground tissue, unlike dicot stems, which have a ring arrangement.

Which layer of the root is directly responsible for the absorption of water and minerals?

Epidermis
Cortex
Endodermis
Pericycle
1

The epidermis, especially its root hairs, absorbs water and minerals from the soil.

Which of the following statements about xylem vessels is incorrect?

Xylem vessels are dead at maturity.
Xylem vessels help in the transport of water and minerals.
Xylem vessels are living at maturity.
Xylem vessels have lignified walls.
3

Xylem vessels are dead at maturity and function in conducting water and minerals from roots to other plant parts.

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