Anatomy of Flowering Plants
Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which layer in the dicot root prevents water loss and has casparian strips?

Cortex
Pericycle
Endodermis
Epidermis
3

The endodermis contains Casparian strips that prevent the passive movement of water, regulating transport into the vascular tissue.

What differentiates an isobilateral leaf from a dorsiventral leaf?

Presence of palisade and spongy mesophyll
Stomata present on both surfaces
Absence of bulliform cells
Presence of large intercellular spaces
2

Isobilateral leaves (e.g., monocots) have stomata on both surfaces, whereas dorsiventral leaves (e.g., dicots) have stomata mostly on the lower surface.

Which of the following statements about stomatal apparatus is correct?

Stomatal pores are surrounded by specialized guard cells.
Guard cells do not contain chloroplasts.
Subsidiary cells are always absent in the stomatal complex.
Stomata are present only in stems and absent in leaves.
1

Stomata are surrounded by specialized guard cells, which regulate the opening and closing of the stomatal pore.

Which type of simple permanent tissue provides mechanical support in mature plants?

Parenchyma
Collenchyma
Sclerenchyma
Xylem
3

Sclerenchyma consists of thick-walled, lignified cells that provide mechanical support in mature plants.

In monocot stems, the vascular bundles are surrounded by which type of supportive tissue?

Parenchyma
Collenchyma
Sclerenchyma
Xylem
3

In monocot stems, each vascular bundle is surrounded by a sheath of sclerenchyma, which provides mechanical support.

Which of the following statements about the hypodermis in monocot stems is incorrect?

It consists of collenchymatous cells.
It provides mechanical strength.
It is present just below the epidermis.
It consists of sclerenchymatous cells.
1

The hypodermis in monocot stems is made of sclerenchyma, whereas in dicot stems, it is made of collenchyma.

What is the function of bulliform cells in monocot leaves?

Photosynthesis
Water absorption
Leaf folding during drought
Mechanical support
3

Bulliform cells help in folding the leaves to reduce water loss under drought conditions.

Which of the following plant tissues is responsible for the transport of food?

Xylem
Phloem
Sclerenchyma
Collenchyma
2

Phloem is responsible for transporting organic nutrients, primarily sucrose, from source to sink in plants.

Which of the following statements about collenchyma is incorrect?

Collenchyma provides mechanical support to young stems and leaves.
Collenchyma cells have unevenly thickened cell walls.
Collenchyma cells are dead at maturity.
Collenchyma contains pectin and cellulose in its cell walls.
3

Collenchyma cells remain living at maturity and provide flexibility and mechanical support to growing plant parts.

Which characteristic feature of dicot roots helps in selective absorption of water?

Pith
Endodermis with Casparian strips
Xylem vessels
Root hairs
2

The endodermis in dicot roots contains Casparian strips, which regulate selective water absorption into the vascular bundle.

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