Anatomy of Flowering Plants
Test 2

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which layer of cells in a dicot root lies just inside the endodermis?

Cortex
Pericycle
Pith
Medullary rays
2

The pericycle is the layer of cells located just inside the endodermis and is responsible for the initiation of lateral roots.

Which of the following statements about epidermis in plants is incorrect?

The epidermis is usually a single layer of cells.
Epidermal cells contain chloroplasts.
The epidermis helps in reducing water loss.
Trichomes are part of the epidermal tissue system.
2

Epidermal cells generally lack chloroplasts, except for guard cells, which regulate stomatal opening.

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 of the following statements about xylem parenchyma is correct?

Xylem parenchyma is dead at maturity.
Xylem parenchyma stores food and helps in lateral conduction of water.
Xylem parenchyma is responsible for the conduction of water.
Xylem parenchyma is composed of lignified dead cells.
2

Xylem parenchyma consists of living cells that store starch and fats and assist in lateral water conduction.

Which type of plant cells provide flexibility to young stems and leaves?

Parenchyma
Collenchyma
Sclerenchyma
Xylem fibers
2

Collenchyma cells provide flexibility and mechanical support to young stems and leaves.

Which of the following statements about sieve tube elements in phloem is correct?

Sieve tube elements have nuclei at maturity.
Sieve tube elements are supported by companion cells.
Sieve tube elements are responsible for water transport.
Sieve tube elements have thick, lignified walls.
2

Sieve tube elements lack nuclei and depend on companion cells for their function in transporting food.

What is the function of the casparian strip in the endodermis of roots?

Absorption of minerals
Prevention of passive water movement
Photosynthesis
Transport of food
2

The casparian strip prevents passive movement of water and minerals, forcing selective absorption through plasma membranes.

Which of the following statements about root hairs is correct?

Root hairs develop from the endodermis.
Root hairs increase the surface area for absorption of water and minerals.
Root hairs transport photosynthetic products.
Root hairs are responsible for the transport of organic nutrients.
2

Root hairs are extensions of epidermal cells that increase the surface area for absorption of water and minerals.

What is the function of guard cells in stomata?

Absorption of minerals
Opening and closing of stomatal pore
Storage of food
Providing mechanical support
2

Guard cells regulate the opening and closing of stomatal pores to control transpiration and gas exchange.

Which of the following statements about bundle sheath cells is incorrect?

Bundle sheath cells surround vascular bundles.
Bundle sheath cells regulate the movement of substances into and out of vascular tissues.
Bundle sheath cells are present only in monocots.
Bundle sheath cells provide mechanical support.
3

Bundle sheath cells are present in both monocots and dicots, although they are more specialized in C4 plants.

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