Anatomy of Flowering Plants Test

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Anatomy of Flowering Plants Test - 73

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Weekly Quiz Competition

Question 1
1 / -0

Identify the given diagram and select the correct option?

A
Dicot root with well developed pith

B
Dicot root with radial vascular bundle

C
Monocot root with well developed pith

D
Monocot root with endarch xylem

Solution

Monocot root is made up of well developed pith that is composed of loosely arranged parenchymatous cells. The vascular bundles are 8 in number and radially arranged
So, the correct answer is C.
Question 2
1 / -0

Vascular bundle in which the protoxylem arranged at the center?

A
Endarch

B
Exarch

C
Mesarch

D
Diarch

Solution

Endarch:- protoxylem is formed toward the centre (pith) and metaxylem is formed away from the centre (periphery). Example:- stem of Angiosperm and Gymnosperm.
Exarch:- protoxylem is formed towards the periphery and metaxylem is formed towards the centre. Ex. Roots
Mesarch:-Elements of metaxylem are formed on both sides of the elements of protoxylem.Ex. fern rhizome.
So correct answer is C (mesarch).
Question 3
1 / -0

Xylem and phloem are present on the same radius, such a vascular bundle is called?

A
Radial

B
Bicollateral

C
Concentric

D
Conjoint

Solution

Radial vascular bundle:- when the xylem and phloem are present separately on different radii in alternate manner, then vascular bundle are called radial vascular bundle.
Conjoint vascular bundle:- in these type of vascular bundle xylem and phloem are present on same radius and combine into a bundle.
So here correct answer is option D.
Question 4
1 / -0

What is present around a vascular bundle of a monocot stem?

A
Pericycle

B
Endodermis

C
Pericycle & endodermis both

D
Bundle sheath
Question 5
1 / -0

Pitch is less developed in ____________.

A
Dicot stem

B
Dicot root

C
Monocot stem

D
Monocot root

Solution

Pith is made up of soft, spongy tissues that helps in transport nutrients, storage. In dicot root pith is not present whereas pith is present in dicot stem.
So, the correct answer is B.
Question 6
1 / -0

Interfascicular cambium in dicot root is

A
Formed by redifferentiation of medullary ray cells

B
Formed by dedifferentiation of medullary cells

C
Formed by dedifferentiation of medullary cell

D
absent
Question 7
1 / -0

Identify the incorrect statement with respect to monocot stem.

(a) Hypodermis is made up of sclerenchyma
(b) Ground tissue is differentiated
(c) Vascular bundles which are situated towards the center are larger in size and less in number
(d) Each vascular bundle is conjoint, collateral and closed and xylem is endarch.

A
a, b and c

B
b, c and d

C
only b

D
b and c

Solution

C. Only b

Reason: In monocot stem vascular tissue is in the form of atactostele, where a large number of vascular bundles lie scattered throughout the ground tissue. Vascular bundles are smaller but more numerous towards the outside than towards the centre. They contain both phloem and xylem. The vascular bundles are, therefore, conjoint, collateral but closed.
Question 8
1 / -0

Plants have evolved various defences to lessen the impact of predation by herbivores. Choose the correct option for the defence measures in the given plants. Where M-Morphological, C-Chemical, A-Anatomical, P-Physiological.

Acacia Cactus Calotropis
$$(1)$$ P P M
$$(2)$$ A M C
$$(3)$$ P C C
$$(4)$$ M M C

A
A

B
B

C
C

D
D
Question 9
1 / -0

Cambial ring in dicot root is initially

A
Wavy

B
Circular

C
Discontinuous

D
Crescentric

Solution

A. Wavy
EXPLANATION: Vascular cambium of dicot root originates from the pericycle tissue located just below the phloem bundles. A part of pericycle tissue above the protoxylem forms complete wavy ring. So the cambial ring in dicot root is initially wavy.
Question 10
1 / -0

In which type of vascular bundles are Xylem and Phloem present at the same radius ?

A
Radial

B
Closed

C
Conjoint

D
Exarch

Solution

Vascular bundles with xylem and phloem present on the same radius is called conjoint, a characteristic of stem anatomy
So, the correct answer is 'conjoint'

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	Acacia	Cactus	Calotropis
$$(1)$$	P	P	M
$$(2)$$	A	M	C
$$(3)$$	P	C	C
$$(4)$$	M	M	C

Anatomy of Flowering Plants Test - 73

Result

Anatomy of Flowering Plants Test - 73

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Question 1

Dicot root with well developed pith

Dicot root with radial vascular bundle

Monocot root with well developed pith

Monocot root with endarch xylem

Solution

Question 2

Endarch

Exarch

Mesarch

Diarch

Solution

Question 3

Radial

Bicollateral

Concentric

Conjoint

Solution

Question 4

Pericycle

Endodermis

Pericycle & endodermis both

Bundle sheath

Question 5

Dicot stem

Dicot root

Monocot stem

Monocot root

Solution

Question 6

Formed by redifferentiation of medullary ray cells

Formed by dedifferentiation of medullary cells

Formed by dedifferentiation of medullary cell

absent

Question 7

a, b and c

b, c and d

only b

b and c

Solution

Question 8

A

B

C

D

Question 9

Wavy

Circular

Discontinuous

Crescentric

Solution

Question 10

Radial

Closed

Conjoint

Exarch

Solution

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