NEET Biology Anatomy of Flowering Plants MCQs Set 12

Multiple Choice Questions (MCQs) for NEET Biology: Anatomy Of Flowering Plants

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Multiple Choice Questions

Question 1: Protophloem has narrow sieve tubes whereas the metaphloem has
(a) narrower sieve tubes
(b) bigger sieve tubes
(c) no sieve tubes
(d) only parenchyma
Show Answer & Explanation

Answer: (b) bigger sieve tubes

Explanation:
1. Protophloem is the first formed phloem.

Teacher's Note:
1. The same is true for xylem.

Question 2: On the basis of structure and location, the plant tissue systems are of how many types?
(a) Two
(b) Four
(c) Three
(d) Five
Show Answer & Explanation

Answer: (c) Three

Explanation:
1. They are epidermal, ground and vascular tissue systems.

Teacher's Note:
1. Each system extends through the plant body.

Question 3: Guard cells are bean shaped in dicots and
(a) circular in grasses
(b) absent in grasses
(c) rectangular in grasses
(d) dumb-bell shaped in grasses
Show Answer & Explanation

Answer: (d) dumb-bell shaped in grasses

Explanation:
1. Dumb-bell shaped guard cells are characteristic of monocot grasses.

Teacher's Note:
1. The guard cells contain chloroplasts.

Question 4: All tissues except epidermis and vascular bundles constitute the
(a) epidermal system
(b) vascular system
(c) cambium
(d) ground tissue system
Show Answer & Explanation

Answer: (d) ground tissue system

Explanation:
1. Ground tissue includes cortex, pericycle, pith and medullary rays in roots and stems.

Teacher's Note:
1. In leaves it is mesophyll.

Question 5: Which type of vascular bundles are found in roots?
(a) Radial
(b) Conjoint collateral open
(c) Conjoint collateral closed
(d) Conjoint bicollateral
Show Answer & Explanation

Answer: (a) Radial

Explanation:
1. In roots xylem and phloem are on different radii alternating with each other.

Teacher's Note:
1. Stems and leaves have conjoint bundles.

Question 6: The vascular bundles of a sunflower stem are
(a) conjoint, collateral and closed
(b) conjoint, collateral and open
(c) radial
(d) conjoint and concentric
Show Answer & Explanation

Answer: (b) conjoint, collateral and open

Explanation:
1. Dicot stems have cambium between xylem and phloem so the bundles are open.

Teacher's Note:
1. Monocot bundles are closed.

Question 7: A transverse section shows usually more than six xylem bundles with exarch xylem, a large well developed pith and radial arrangement. This is a
(a) dicot root
(b) dicot stem
(c) monocot root
(d) monocot stem
Show Answer & Explanation

Answer: (c) monocot root

Explanation:
1. Polyarch xylem with large pith is typical of monocot roots.

Teacher's Note:
1. Dicot roots have two to four xylem bundles.

Question 8: A section shows two to four xylem and phloem patches with exarch xylem, a small pith and radial bundles. It is a
(a) monocot root
(b) dicot stem
(c) dicot root
(d) monocot stem
Show Answer & Explanation

Answer: (c) dicot root

Explanation:
1. Diarch to tetrarch xylem with small pith is typical of dicot roots.

Teacher's Note:
1. Secondary growth occurs in dicot roots.

Question 9: Casparian strips are present in the
(a) endodermis of roots
(b) pericycle
(c) epidermis
(d) cortex
Show Answer & Explanation

Answer: (a) endodermis of roots

Explanation:
1. Casparian strips are suberin deposits on radial and tangential walls of endodermal cells.

Teacher's Note:
1. They regulate water entry.

Question 10: Lateral roots in flowering plants originate from the
(a) pericycle
(b) endodermis
(c) cortex
(d) epidermis
Show Answer & Explanation

Answer: (a) pericycle

Explanation:
1. Pericycle cells divide to produce lateral roots, so they are endogenous in origin.

Teacher's Note:
1. Pericycle also takes part in secondary growth.

Question 11: In a dicot stem the endodermis is also called the
(a) starch sheath
(b) bundle sheath
(c) hypodermis
(d) pericycle
Show Answer & Explanation

Answer: (a) starch sheath

Explanation:
1. The endodermis of a dicot stem has starch grains.

Teacher's Note:
1. In roots Casparian strips are in the endodermis.

Question 12: In a dorsiventral leaf, the palisade parenchyma lies towards the
(a) abaxial epidermis
(b) vascular bundle
(c) lower surface
(d) adaxial epidermis
Show Answer & Explanation

Answer: (d) adaxial epidermis

Explanation:
1. Palisade cells are on the upper side and spongy parenchyma towards the abaxial side.

Teacher's Note:
1. Adaxial means the upper surface.

Question 13: In grasses, the large, empty, colourless adaxial epidermal cells along the veins are called
(a) guard cells
(b) bulliform cells
(c) subsidiary cells
(d) trichomes
Show Answer & Explanation

Answer: (b) bulliform cells

Explanation:
1. Bulliform cells lose water and make the leaf curl inwards to reduce water loss.

Teacher's Note:
1. They occur in monocot leaves.

Question 14: In a dicot stem, the cambium between primary xylem and primary phloem is the
(a) intrafascicular cambium
(b) interfascicular cambium
(c) cork cambium
(d) phellogen
Show Answer & Explanation

Answer: (a) intrafascicular cambium

Explanation:
1. The cambium within the vascular bundle is intrafascicular, and the one in the medullary rays interfascicular.

Teacher's Note:
1. Together they form a cambial ring.

Question 15: Which lateral meristem forms phellem and phelloderm?
(a) Vascular cambium
(b) Intercalary meristem
(c) Apical meristem
(d) Phellogen
Show Answer & Explanation

Answer: (d) Phellogen

Explanation:
1. Phellogen (cork cambium) cuts phellem outside and phelloderm inside.

Teacher's Note:
1. These three make periderm.

Question 16: The lateral meristem responsible for secondary xylem, secondary phloem and secondary medullary rays is the
(a) vascular cambium
(b) cork cambium
(c) intercalary meristem
(d) apical meristem
Show Answer & Explanation

Answer: (a) vascular cambium

Explanation:
1. Vascular cambium adds tissues on both sides, more xylem than phloem.

Teacher's Note:
1. Cork cambium forms periderm.

Question 17: Spring wood compared with autumn wood is
(a) darker with high density
(b) lighter in colour with low density
(c) darker with low density
(d) lighter with high density
Show Answer & Explanation

Answer: (b) lighter in colour with low density

Explanation:
1. Spring wood has wider vessels and lighter colour.

Teacher's Note:
1. Both together make an annual ring.

Question 18: Heart wood consists of dead elements with highly lignified walls and
(a) does not conduct water and minerals
(b) conducts water
(c) stores food
(d) is soft and light
Show Answer & Explanation

Answer: (a) does not conduct water and minerals

Explanation:
1. It is dark due to tannin and resin deposition and gives mechanical support.

Teacher's Note:
1. Sapwood conducts water.

Question 19: Phellem, phellogen and phelloderm are together termed
(a) periderm
(b) bark
(c) cambium
(d) cortex
Show Answer & Explanation

Answer: (a) periderm

Explanation:
1. Periderm replaces the epidermis in woody plants.

Teacher's Note:
1. Phelloderm is secondary cortex.

Question 20: All the tissues exterior to the vascular cambium, including secondary phloem, are loosely called
(a) heartwood
(b) sapwood
(c) bark
(d) pith
Show Answer & Explanation

Answer: (c) bark

Explanation:
1. Bark is a non-technical term for tissues outside the vascular cambium.

Teacher's Note:
1. Bark includes periderm and secondary phloem.

Question 21: Phellem or cork is impervious to water because of deposition of
(a) suberin
(b) lignin
(c) cutin
(d) pectin
Show Answer & Explanation

Answer: (a) suberin

Explanation:
1. Cork cells are dead with suberised walls.

Teacher's Note:
1. Lenticels allow gas exchange in woody stems.

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Anatomy Of Flowering Plants Objective Questions & Solutions for NEET Biology

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