Morphology of Flowering Plants Test 49

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Morphology of Flowering Plants Test 49

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Weekly Quiz Competition

Question 1
1 / -0

The characteristic odour of garlic is due to

A
A fluorine compound

B
A sulphur compound

C
A chloro compound

D
Acetic acid

Solution

Garlic (Allium sativum) is a species in the onion genus, Allium. Garlic is native to Central Asia and northeastern Iran, and has long been a common seasoning worldwide, with a history of several thousand years of human consumption and use. It was known to ancient Egyptians, and has been used both as a food flavoring and as a traditional medicine. China produces some 80% of the world supply of garlic. Garlic is known to cause bad breath (halitosis) and body odor, described as a pungent "garlicky" smell to sweat. This is caused by allyl methyl sulfide (AMS). AMS is a volatile liquid which is absorbed into the blood during the metabolism of garlic-derived sulfur compounds; from the blood it travels to the lungs and skin, where it is exuded through skin pores.
So the correct option is 'A sulphur compound'.
Question 2
1 / -0

Consider the following statements.

(i) In Gynandropsis, Passiflora, etc. thalamus is elongated and shows well developed nodes and internodes.
(ii) The floral buds in Agave, Allium, etc. may sometimes get modified into vegetative buds or bulbils.
(iii) Sepals are concerned with protection of flowers in bud condition and petals help to attract insects for pollination.
(iv) Stamens and carpels serve as the male and female reproductive organs respectively.

Which of the following combinations of above statements provides an evidence that flower is a modified shoot?

A
(i) and (ii)

B
(ii) and (iii)

C
(iii) and (iv)

D
(i) and (iv)

Solution

The flower is a modified shoot, divided into nodes and internodes like an ordinary vegetative shoot. However, some of the flowering shoots are highly compressed (i.e. the distinction between nodes and internodes is lost).
In Gynandropsis, Passiflora, etc. the thalamus is elongated and shows well-developed nodes and internodes between the floral organs.
The floral buds in Agave, Allium, etc., are modified into vegetative buds/bulbils. This shows a reversion to the original structure, i.e., vegetative bud from which these have developed.
and, the (iii) (iv) is also correct statements, but they are not an evidence which shows that the flower is a modified shoot.
Hence, the correct answer is (A)
Question 3
1 / -0

Venation is a term used to describe the pattern of arrangement of___________.

A
Floral organs

B
Flower position

C
Veins and veinlets in a lamina

D
All of the above

Solution

The arrangement of veins and veinlets on the lamina of the leaf is called as venation.
Option C is correct.
Question 4
1 / -0

Refer the given figure and select the correct option.

A
The parts labelled $$a$$ and $$b$$ give rise to seed and fruit respectively

B
The parts labelled $$c$$ and $$b$$ give rise to send and fruit respectively

C
The part labelled $$d$$ results in endosperm

D
Both (A) and (C)
Solution
Correct option: A

Explanation:
a- Ovule, b- Ovary, c- Embryo sac, d- Micropyle
On fertilization, Ovules develop into a seed & Ovary develop into a fruit.
The female gametophyte or embryo sac of a seed plant consisting of a thin-walled sac within the nucellus that contains the egg nucleus and other nuclei which give rise to endosperm on fertilization.
Micropyle is a small opening in the surface of an ovule, through which the pollen tube penetrates, often visible as a small pore in the ripe seed.
Therefore, Option A is correct.
Question 5
1 / -0

Match the followings and choose correct option.

Group A Group B
A. Aleurone layer (i). Without fertilisation
B. Parthenocarpic fruit (ii). Nutrition
C. Ovule (iii). Double fertilisation
D. Endosperm (iv). Seed

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

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

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

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

Solution

Aleurone layer - a layer of protein storage cells, present in cereal, maize seed, and is a form of reserved food material.
Parthenocarpic fruit - when the ovary is stimulated to form fruit without fertilization then it is a parthenocarpic fruit
Example, seed less grapes, water melon
Ovule: contains embryo sac with egg cell, synergids, polar nuclei and antipodal cells. In angiosperms the pollen tube releases two male gametes, of which one fuses with the egg cell to form the zygote while the other fuses with polar nuclei to form triploid PEN
Endosperm- PEN develops into endosperm which provides nutrients to the developing embryo.
So, the correct answer is 'A- (iv), B-(i), C-(iii), D - (ii)'
Question 6
1 / -0

In a inflorescence where flowers are borne laterally in an acropetal succession, the position of the youngest floral bud shall be

A
Proximal

B
Distal

C
Intercalary

D
Anywhere
Solution
A. Correct option: B

B. Explanation for correct option:
This is the type of racemose inflorescence found in mustard, wheat etc
- In acropetal succession, the position of youngest flower is distal or towards apex
- The position of older flowers is proximal or towards the base.
Question 7
1 / -0

Which of the following is a dicotyledonous family?

A
Liliaceae

B
Solanaceae

C
Pappilionaceae

D
Both B and C

Solution

Dicotylodoneae is a group of angiosperms that are characterized by:
Taproot system,
Vascular tissue present in columns,
Posses xylem vessels,
Leaves have reticulate venation,
Stem with open collateral vascular bundles arranged in a ring and
Seed is covered by fruits and
Show secondary growth.
All these characters are found in families Solanaceae and Pappilionaceae.
So the correct option is 'Both B and C'
Question 8
1 / -0

The immature banyan fruit is a

A
Bypanthodium inflorescence

B
Capsule

C
Samara

D
Berry

Solution

The immature banyan fruit is Bypanthodium inflorescence.
Correct option is A.
In Bypanthodium inflorescence the receptacle forms a hollow cavity with apical opening and guarded by scales. Unisexual flower are present and male flower develop at apical pore and female develop at base of the cavity.
Question 9
1 / -0

A modification of petiole is

A
Phyllode

B
Phylloclade

C
Cladode

D
Corm

Solution

Phyllode is a green, expanded structure formed by the modification of petiole or rachis of the leaf. In most of the xerophytes, leaves are reduced to prevent water loss in such plants phyllodes develop to carry out photosynthesis.
An example is Acacia.
So the correct option is 'Phyllode'
Question 10
1 / -0

All given modifications belong to adventitious roots, except

A
Reproductive root of Asparagus

B
Storage roots of sweet potato

C
Conical roots of carrot

D
Prop roots of banyan tree
Solution
- Adventitious roots are those parts that arise from the organ other than the roots. They usually arise from the stem, internodes, leaves.
- They may be underground or aerial. Examples include rhizomes, corms, tubers.
A. The reproductive root of Asparagus is an adventitious root. It occurs in clusters and it is swollen.
B. In sweet potato, adventitious roots grow from the nodes of the running stem. They are also called storage roots and edible root-tubers.
C. Conical roots of carrot is an example of the taproot.
D. In the banyan tree, horizontal aerial branches give rise to aerial adventitious roots. They are also called prop roots, as they support horizontal branches.

Thus, the correct answer is option C.

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Re-Attempt Weekly Quiz Competition

	Group A		Group B
A.	Aleurone layer	(i).	Without fertilisation
B.	Parthenocarpic fruit	(ii).	Nutrition
C.	Ovule	(iii).	Double fertilisation
D.	Endosperm	(iv).	Seed

Morphology of Flowering Plants Test 49

Result

Morphology of Flowering Plants Test 49

Score

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Rank

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SHARING IS CARING

Question 1

A fluorine compound

A sulphur compound

A chloro compound

Acetic acid

Solution

Question 2

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

(i) and (iv)

Solution

Question 3

Floral organs

Flower position

Veins and veinlets in a lamina

All of the above

Solution

Question 4

The parts labelled $$a$$ and $$b$$ give rise to seed and fruit respectively

The parts labelled $$c$$ and $$b$$ give rise to send and fruit respectively

The part labelled $$d$$ results in endosperm

Both (A) and (C)

Solution

Question 5

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

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

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

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

Solution

Question 6

Proximal

Distal

Intercalary

Anywhere

Solution

Question 7

Liliaceae

Solanaceae

Pappilionaceae

Both B and C

Solution

Question 8

Bypanthodium inflorescence

Capsule

Samara

Berry

Solution

Question 9

Phyllode

Phylloclade

Cladode

Corm

Solution

Question 10

Reproductive root of Asparagus

Storage roots of sweet potato

Conical roots of carrot

Prop roots of banyan tree

Solution

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