Morphology of Flowering Plants Test 51

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Morphology of Flowering Plants Test 51

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Question 1
1 / -0

Find correct match

Column I Column II

a. Sinigrin (i) Liliaceae
b. Carthamin (ii) Brassicaceae
c. Atropine (iii) Solanaceae
d. Aloin (iv) Asteraceae

A
a (ii), b (iv), c (iii), d (i)

B
a (ii), b (iv), c (i), d (iii)

C
a (i), b (ii), c (iii), d (iv)

D
a (i), b (ii), c (iv), d (iii)

Solution

Sinigrin is a glucosinolate that belongs to the family of glucosides found in some plants of the Brassicaceae family.
Carthamin is the red pigment present in the petals of Carthamus tinctorius ( Asteraceae).
Atropine, a commonly used ophthalmological agent, dilates the pupils and thus facilitates examination.
Aloin (also known as Aloe latex or Anthraquinones) comes from a thin layer of yellow sap that separates the outer rind from the inner gel-like portion of the leaf and acts as the laxative component.
So the correct option is 'a(ii), b(iv). c(iii), d(i)'.
Question 2
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Pneumatophore is present in

A
Rhizophora

B
Nerium

C
Hibiscus

D
Acaccia

Solution

The aerial, adventitious roots formed from lateral roots, in mangrove plants are called Pneumatophores. These are meant for gaseous exchange.
So, the correct option is 'Rhizophora'.
Question 3
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Which amongst the following options contains mismatched pair?

A
direct elongation of radical -primary roots

B
root system originating from the stem's base - fibrous roots

C
roots not arising from the radical - stit roots

D
constitution of primary root and its branches - tap root system

E
All are correctly matched.
Solution
- The primary root, or radicle, is the first organ to appear when a seed germinates. It grows downward into the soil, anchoring the seedling from the embryonic root (radicle), which grows out of the seed after the seed has absorbed water. This is the primary root of a new plant.
- A fibrous root system is the opposite of a taproot system. It is usually formed by thin, moderately branching roots growing from the stem
- Stilt roots are the adventitious roots that help in supporting the plant body. Also known as support roots. These roots develop from the basal nodes of the main stem.
- A taproot is a large, central, and dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downward. Taproot, the main root of a primary root system, growing vertically downward.
So. the correct answer is 'All are correctly matched'.

Question 4

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Match Colum-I with Column-II and select the correct option from the codes given.

Column-I (Type of fleshy tap roof)	Column-II (Example)
A. Conical	(i) Brassica rapa
B. Fusiform	(ii) Daucus Carota
C. Napiform	(iii) Raphanus sativus
D. Tuberous	(iv) Mirabilis jalapa

A-(ii), B-(iii), C-(i), D-(iv)

A-(iii), B-(ii), C-(i), D-(iv)

A-(ii), B-(i), C-(iii), D-(iv)

A-(ii), B-(iii), C-(iv), D-(i)

Solution

Taproot	Examples
1) Conical These are Conical in shape.	Daucus carota
2)Fusiform The root is broader in the middle and narrower at the two ends.	Raphanus sativus
3)Napiform Root swells extraordinarily at its base and in middle	Brassica rapa
4) Tuberous They do not possess any definite shape	Mirabilis jalapa

Question 5
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Racemose inflorescence is identified by

A
Acropetal arrangement of flowers on peduncle

B
Presence of sessile flower

C
Continuous growth of main axis

D
Both A and C
Solution
- Inflorescence refers to the arrangement of group or cluster flowers on a stem.
- In an acropetal arrangement of flowers, the young flowers and buds are formed at the top of the stalk and the older flowers are formed at the bottom, this type of flowering arrangement pattern is called Racemose inflorescence.
- So, the correct answer is 'The acropetal arrangement of flowers on peduncle'.
Question 6
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A distinct endodermis is a constant feature of

A
Dicot leaves

B
Monocot stems

C
Monocot leaves

D
Dicot stema

Solution

The cells of the endodermis typically have their primary cell walls thickened on four sides radial and transverse with suberin, a water-impermeable waxy substance which in young endodermal cells is deposited in distinctive bands called Casparian strips.
So the correct option is 'Dicot leaves'.
Question 7
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Leaf is _________ in origin.

A
Endogenous

B
Exogenous

C
Axillary

D
Indefinite

Solution

Leaves are exogenous (develop away from the plant body) in origin and develops from the swollen leaf primordium of the growing apex.
So, the correct option is 'Exogenous'.
Question 8
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Given below are the names of plants:
Indigofera, Sesbania, Lupinus, Glycyrhiza ,Glycine max ,Crotolaria
how many of these plant possess diadelphous stamens:

A
Six

B
Four

C
Three

D
Two
Solution
Stamens are the male reproductive part of a flower, it consists of anther and filament. They are of two types:
Monadelphous stamens are stamens that are present in one group, all the filaments are attached tother.
Diadelphous stamens are stamens that are present in two bundles and filaments are attached together.
Many members of the family Fabaceae commonly have diadelphous stamens. E.g.; Indigofera, Sesbania, Lupinus, Glycyrrhiza, Glycine max, Crotolaria have diadelphous stamens, present in the form of two bundles. The total number of stamens is 10 so one group has 1 stamen while another group has 9 stamens.
So, the correct option is 'Six'
Question 9
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______ is an example of racemose inflorescence.

A
Clerodendron

B
Hibiscus

C
Jasmine

D
Caesalpini
Solution
In racemose inflorescence the axis is of unlimited growth, apical bud continues to grow. Thus oldest flowers are found at the base and youngest towards the top. These are of different types such as, raceme, panicle, spike, spadix, etc. eg: Delphinium, Brassica Campestris, caesalpini.
In cymose inflorescence the main axis has limited growth, being terminated by the formation of a flower. Thus, oldest flower is either in the center or flowers of different ages are mixed up. These are of various types such as monochasial, dichasial, polychasial etc. eg: Allium, Clerodendron, Hibiscus, Jasmine.
So, the correct option is 'Caesalpini'.
Question 10
1 / -0

Midrib is observed in which part of leaf?

A
Leaf base

B
Lamina

C
Petiole

D
Stipule
Solution
The leaf consists of the following parts-
1) Leaf blade (lamina) is the broad and flat part of the leaf where photosynthesis occurs is also known as epipodium.
The midrib is the central prominent vein on the lamina which helps to transport water, minerals to different cells of the leaf.
2) Leaf base is the lowermost part of the leaf and is also known as hypopodium
3) The petiole is the stalk-like part of the leaf which connects the leaf blade to the stem.
Stipule is a small flap-like structure which grows at the base of the petioles and protects the growing petioles or falls off.
So, the correct answer is 'Lamina'.

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Morphology of Flowering Plants Test 51

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Question 1

a (ii), b (iv), c (iii), d (i)

a (ii), b (iv), c (i), d (iii)

a (i), b (ii), c (iii), d (iv)

a (i), b (ii), c (iv), d (iii)

Solution

Question 2

Rhizophora

Nerium

Hibiscus

Acaccia

Solution

Question 3

direct elongation of radical -primary roots

root system originating from the stem's base - fibrous roots

roots not arising from the radical - stit roots

constitution of primary root and its branches - tap root system

All are correctly matched.

Solution

Question 4

A-(ii), B-(iii), C-(i), D-(iv)

A-(iii), B-(ii), C-(i), D-(iv)

A-(ii), B-(i), C-(iii), D-(iv)

A-(ii), B-(iii), C-(iv), D-(i)

Solution

Question 5

Acropetal arrangement of flowers on peduncle

Presence of sessile flower

Continuous growth of main axis

Both A and C

Solution

Question 6

Dicot leaves

Monocot stems

Monocot leaves

Dicot stema

Solution

Question 7

Endogenous

Exogenous

Axillary

Indefinite

Solution

Question 8

Six

Four

Three

Two

Solution

Question 9

Clerodendron

Hibiscus

Jasmine

Caesalpini

Solution

Question 10

Leaf base

Lamina

Petiole

Stipule

Solution

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