Practice Start Test

Anatomy of Flowering Plants

NEET Biology · 150 questions · Page 1 of 15 · Click an option or "Show Solution" to reveal answer

Q1
What is the direction of movement of sugars in phloem?
A Downward
B Bi-directional
C Non-multidirectional
D Upward
Correct Answer
Option B
Solution

The direction of movement of sugars in phloem is Bi-directional.

Q2
Plants having little or no secondary growth are
A deciduous angiosperms
B grasses
C cycads
D conifers
Correct Answer
Option B
Solution

Grasses are monocots and monocots usually do not have secondary growth.

Palm like monocots have anomalous secondary growth

Q3
Casparian strips occur in
A pericycle
B epidermis
C endodermis.
D cortex
Correct Answer
Option C
Solution

Endodermis have casparian strips on radial and inner tangential wall. It is rich in suberin.

Q4
Stomata in grass leaf are
A kidney-shaped
B barrel-shaped
C dumb-bell shaped
D rectangular
Correct Answer
Option C
Solution

Grass being a monocot, has Dumb-bell shaped stomata in their leaves.

Q5
Secondary xylem and phloem in dicot stem are produced by
A vascular cambium
B axillary meristems
C apical meristems
D phellogen
Correct Answer
Option A
Solution

The cells of vascular cambium cut off towards pith, mature into secondary xylem and the cells cut off towards periphery mature into secondary phloem during secondary growth in dicot stem.

Q6
The cork cambium, cork and secondary cortex are collectively called :
A Periderm
B Phellem
C Phellogen
D Phelloderm
Correct Answer
Option A
Solution

Phellem, phellogen and phelloderm are collectively called periderm.

Q7
Initiation of lateral roots and vascular cambium during secondary growth takes place in cells of
A Pericycle
B Epiblema
C Cortex
D Endodermis
Correct Answer
Option A
Solution

Initiation of lateral roots and vascular cambium during secondary growth takes place in pericycle cells of dicot roots.

Epiblema, endodermis and cortex do not dedifferentiate.

Q8
The main function of bulliform cells in grasses is :
A to make the leaf impermeable to fungal spores.
B to transport water.
C to perform photosynthesis.
D to minimize water loss during water stress.
Correct Answer
Option D
Solution

Bulliform cells are large empty colourless cells that lose water and become flaccid in water scarce condition.

Hence they curl the leaf inwards to minimise water loss by reducing the exposed surface area.

Q9
In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called:
A Integument
B Aleurone layer
C Coleoptile
D Coleorhiza
Correct Answer
Option B
Solution

The correct answer is Option B: Aleurone layer. • The aleurone layer is a protein-rich tissue that surrounds the starchy endosperm in cereal seeds. • It lies just beneath the seed coat and separates the endosperm from the embryo. • In contrast: â€" Integuments are the tissues surrounding the ovule. â€" Coleoptile is the sheath covering the emerging shoot. â€" Coleorhiza is the sheath covering the emerging root.

Q10
Find the statement that is NOT correct with regard to the structure of monocot stem.
A Vascular bundles are conjoint and closed.
B Phloem parenchyma is absent.
C Hypodermis is parenchymatous.
D Vascular bundles are scattered.
Correct Answer
Option C
Solution

The statement that is NOT correct for a typical monocot stem is: Option C: Hypodermis is parenchymatous.

Explanation: • In monocot stems â€" Vascular bundles are indeed conjoint (xylem + phloem together), closed (no cambium) and scattered throughout the ground tissue. â€" Phloem parenchyma is absent. â€" The hypodermis, however, is usually sclerenchymatous (providing mechanical support), not parenchymatous.

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