Root pressure is primarily responsible for:

The correct answer is B: Pushing water upwards in xylem. Root pressure is a positive pressure that pushes water upwards in xylem due to active uptake of minerals by root cells.

Phloem tissue in angiosperms is characterized by the presence of:

The correct answer is B: Sieve tubes and companion cells. Sieve tube elements and companion cells are the conducting and supporting elements of phloem tissue in angiosperms for translocation of organic solutes.

In monocot roots, the absence of secondary growth is primarily due to:

The correct answer is A: Lack of vascular cambium. Monocots lack a functional vascular cambium, which is essential for secondary growth, hence they remain herbaceous throughout life.

The phenomenon of photoinhibition in plants occurs due to:

The correct answer is B: Extremely high light intensity causing damage to PSII. Photoinhibition occurs when light intensity exceeds the photosynthetic capacity, causing photodamage to PSII reaction center and photodissociation of D1 protein.

During the development of a dicot leaf, the dorsiventral structure is established with palisade parenchyma on the adaxial surface and spongy mesophyll on the abaxial surface. Which combination of factors is primarily responsible for maintaining this

The correct answer is A: Differential light intensity exposure and auxin gradient from the apical meristem. The dorsiventral structure of dicot leaves is primarily established by differential light exposure (adaxial surface receives more direct light, promoting compact palisade development) combined with auxin gradients that influence cell differentiation patterns. The abaxial surface, receiving diffuse l

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NEET Botany
Plant Anatomy

Botany questions for NEET UG — Plant Anatomy, Physiology, Reproduction, Ecology.

24 Q 3 Topics Take Mock Test

Difficulty: All Easy Medium Hard 21–24 of 24

Topics in NEET Botany

All Plant Kingdom 100 Plant Anatomy 100 Plant Physiology 76

Q.21 Hard Plant Anatomy

Companion cells in phloem are directly associated with:

A Tracheid elements

B Sieve tube elements

C Vessel elements

D Fiber cells

Correct Answer: B. Sieve tube elements

EXPLANATION

Companion cells are parenchymatous cells attached to sieve tube elements, providing metabolic support for phloem transport.

Test

Q.22 Hard Plant Anatomy

The vascular cambium originates from:

A Protoderm

B Procambium and ground meristem

C Epidermis

D Endodermis

Correct Answer: B. Procambium and ground meristem

EXPLANATION

Vascular cambium is derived from residual procambium (between primary xylem and phloem) and adjacent ground meristem cells.

Test

Q.23 Hard Plant Anatomy

In xerophytes, which anatomical feature reduces water loss?

A Large leaf surface area

B Sunken stomata and thick waxy cuticle

C Large intercellular spaces

D Thin cuticle

Correct Answer: B. Sunken stomata and thick waxy cuticle

EXPLANATION

Xerophytes have sunken stomata (reducing direct exposure) and thick, waxy cuticles to minimize transpiration.

Test

Q.24 Hard Plant Anatomy

Which anatomical adaptation helps hydrophytes (aquatic plants) to float?

A Thick cuticle

B Aerenchyma tissue with air spaces

C Extensive root system

D Reduced stomatal density

Correct Answer: B. Aerenchyma tissue with air spaces

EXPLANATION

Aerenchyma tissue with large intercellular air spaces provides buoyancy to aquatic plants.

Test

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NEET Botany Plant Anatomy

NEET Botany
Plant Anatomy