Morphology of Flowering Plants Test 69

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Morphology of Flowering Plants Test 69

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Question 1
1 / -0

The inflorescence found in the coconut plant is

A
Spadix

B
Compound spadix

C
Compound spike

D
Compound corymb
Solution
1. The type of inflorescence in which flowers are protected by enveloping bracts known as a spathe. ex:-banana.
2. The flowers are protected by spathe but the axis is branched. ex: palm and coconut.
3. The axis is branched and the flowers are born sessile on the branches. ex: wheat.
4. When the main axis is branched and flowers are arranged in a corymbose manner. ex:-cauliflower
So the correct option is "Compound spadix".
Question 2
1 / -0

Rhipidium inflorescence of Solanum nigrum is

A
Modified scorpiod cyme

B
Helicoid cyme

C
Capitulum

D
Multiparous cyme
Solution
1. Rhipidium is scorpioid cyme having all flowers in one plane.Ex. Solanum nigrum
2. In helicoid cyme, the flowers are born on one side. Ex Begonia
3. Capitulum also called Racemose head in which peduncle is flattened that form receptacle that holds centripetally arranged sessile flowers or floret surrounded by an involucre of bracts. Ex Sunflower Helianthus annuu.
4. In multiparous cyme, the main branch converts into flower the old flower at the center and younger at the periphery while it produces lateral branch as well. Ex Calatropis.
So the correct option is "Modified scorpioid cyme".
Question 3
1 / -0

In moss capsule, the number of peristome whorls are

A
1

B
2

C
3

D
4

Solution

In mosses, the peristome is a specialized structure in the sporangium that allows for gradual spore discharge, instead of releasing them all at once.
Peristome is a ring of triangular teeth formed from the remnants of dead cells with thickened cell walls. There are usually 16 such teeth in a single peristome, separate from each other and able to both fold in to cover the stoma as well as fold back to open the stoma. There are two rings of peristome teeth - an inner endostome and an exostome. These are also referred as perostome whorls.
Therefore the correct option is B.
Question 4
1 / -0

Inflorescence of sunflower is

A
Umbel

B
Cyathium

C
Hypanthodium

D
Capitulum

Solution

Sunflower is an annual plant of family Asteraceae with a large head (capitulum), which is the characteristic inflorescence of sunflower. Depending upon the variety, the inflorescence may consist of ray flowers, disk flowers or both. The ovary of each flower is situated below the attachment of the corolla and stamens, a condition referred to as epigynous or inferior. This is the largest family of flowering plants
So, the correct answer is 'Capitulum'
Question 5
1 / -0

Identify the correct combination of character found in Solanum.

A
Solitary axillary flower, berry fruit, bicollateral vascular bundles in stem

B
Solitary terminal flower, porous dehiscence of anther, adnation of petiole with the stem

C
Scorpioid cyme, porous dehiscence of anther, calyx remain attached to the fruit

D
Scorpioid cyme, longitudinal dehiscence of anther, adnation of peduncle with internode

Solution

Scorpiod cyme i.e., lateral branches develop successively on eitherside in zig zag manner e.g., Heliotropium and Solanum.
In Solanum, the anther dehiscence by apical pore as well as by pores formed in longitudinal suture.
Calyx is said to be persistent when it remains attached to the fruits e.g., Solanum.
Therefore, the correct answer is option C.
Question 6
1 / -0

The fleshy receptacle of syconus of fig encloses a number of

A
Achenes

B
Samaras

C
Berries

D
Mericarps

Solution

The inflorescence of figs is known as syconium. This is formed by an enlarged, fleshy, hollow receptacle with multiple ovaries on the inside surface. After pollination the florets develop into achenes or drupes, which encloses the seeds.

Question 7

1 / -0

Study the following lists

	List-I		List-II
A	Food storing condensed branches develop in the axils of bracts on the inflorescence	I	Oxalis
B	A group of bulbils arises from the ground level at the apex of tuberous root	II	Bulbophyllum
C	Bulbils develop from the axils of leaves	III	Agave americana
D	One or more internodes of the sterm stores food and water and becomes tuberous	IV	Dioscorea bulbifera
		V	Cocoloba

The correct match is

(A) - (III), (B) - (IV), (C) - (I), (D) - (II)

(A) - (III), (B) - (I), (C) - (IV), (D) - (II)

(A) - (V), (B) - (I), (C) - (II), (D) - (IV)

(A) - (I), (B) - (II), (C) - (V), (D) - (III)

Solution

In Agave americaria, the condensed branches develop in the axil of bracts on the inflorescence.
In Oxalis, a group of bulbils arise from the ground level at the apex of tuberous root.
In Dioscorea bulbifera, bulbils develop from axils of leaves.
In Bulbophyllum, an epiphyte, generally one internode of the stem stores food and water and becomes tuberous. It appears as a bulb like structureand is called pseudobulb.
Therefore, the correct answer is option B.

Question 8
1 / -0

Catkin inflorescence is found in

A
Wheat

B
Oat

C
Mulberry

D
Fig

Solution

Catkin is a type of inflorescence that is found in willows, birches and oaks and is characterized by dense, cylindrical, often drooping cluster of unisexual apetalous flowers. Mulberry flowers are produced in a catkin, with male and female catkins on different trees.
Question 9
1 / -0

In cyathium inflorescence, the ratio between male : female flower is

A
One : One

B
One : Many

C
Many : One

D
Many : Many

Solution

In cyathium inflorescence, the bracts become fused to form a cup shaped structure. This cup completely encloses a single female flower surrounded by large number of male flowers. The cyathium is surrounded by brightly coloured bracts.
Question 10
1 / -0

Pappus is modified

A
Calyx

B
Corolla

C
Bracts

D
Gynoecium

Solution

Pappus is a modified calyx, that surrounds the base of the corolla tube in the flower heads of the plant family Asteraceae.
Thus the correct answer is option A.

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Morphology of Flowering Plants Test 69

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Morphology of Flowering Plants Test 69

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Question 1

Spadix

Compound spadix

Compound spike

Compound corymb

Solution

Question 2

Modified scorpiod cyme

Helicoid cyme

Capitulum

Multiparous cyme

Solution

Question 3

1

2

3

4

Solution

Question 4

Umbel

Cyathium

Hypanthodium

Capitulum

Solution

Question 5

Solitary axillary flower, berry fruit, bicollateral vascular bundles in stem

Solitary terminal flower, porous dehiscence of anther, adnation of petiole with the stem

Scorpioid cyme, porous dehiscence of anther, calyx remain attached to the fruit

Scorpioid cyme, longitudinal dehiscence of anther, adnation of peduncle with internode

Solution

Question 6

Achenes

Samaras

Berries

Mericarps

Solution

Question 7

(A) - (III), (B) - (IV), (C) - (I), (D) - (II)

(A) - (III), (B) - (I), (C) - (IV), (D) - (II)

(A) - (V), (B) - (I), (C) - (II), (D) - (IV)

(A) - (I), (B) - (II), (C) - (V), (D) - (III)

Solution

Question 8

Wheat

Oat

Mulberry

Fig

Solution

Question 9

One : One

One : Many

Many : One

Many : Many

Solution

Question 10

Calyx

Corolla

Bracts

Gynoecium

Solution

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