Morphology of Flowering Plants Test -3

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Morphology of Flowering Plants Test -3

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Weekly Quiz Competition

Question 1
1 / -0

Which part of the plant help to hold the blade to light?

A
Petiole

B
Stipule

C
Lamina

D
Leaf base

Solution

Thepetiole help hold the blade to light. Long thin flexiblepetioles allow leaf blades to flutter in wind, therebycooling the leaf and bringing fresh air to leaf surface.
Question 2
1 / -0

Which part of the plant store food in garlic?

A
Stem

B
Fleshy leaves

C
Fruit

D
Root

Solution

The fleshy leaves of onion and garlic store food.
Question 3
1 / -0

The correct arrangement of the zones as seen in the vertical section of root is
(i) Root hair zone
(ii) Zone of meristem
(iii) Root cap zone
(iv) Zone of maturation
(v) Zone of elongation

A
(iii), (v), (ii), (i), (iv)

B
(iii), (ii), (v), (i), (iv)

C
(iv), (i), (v), (iii), (ii)

D
(iv), (i), (v), (ii), (iii)

Solution

The correct arrangement of the zones as seen in the vertical section of root is root cap zone, region of meristematic activity, region of elongation, region of maturation and root hair region.
Question 4
1 / -0

Phylloclade are

A
Green succulent stems of indefinite growth

B
One internodes long stem

C
Leaf modifications

D
Modified petiole

Solution

Phylloclade are green succulent stems of indefinite growth that perform thefunction of photosynthesis duet to presence of chlorophyll.
Question 5
1 / -0

Select the insectivorous plant from the following.

A
Santlum

B
Cuscuta

C
Drosera

D
Monotropa

Solution

Those plants that eats insect to fulfill its protein requirement are called insectivorous plants. They have modified leaves to capture insects. Drosera is an insectivoresous plant.
Question 6
1 / -0

120⁰ phyllotaxy occurs in

A
Distichous

B
Pentstichous

C
Octastichous

D
Tristichous

Solution

Phyllotaxy is the arrangement of leaves on a plant stem. 120⁰ phyllotaxy occurs in Tristichousarrangementin which three leaves are arranged at each node.
Question 7
1 / -0

Parallel venation is present in

A
Monocotyledons

B
Dicotyledons

C
Both a&b

D
None of these

Solution

Parallel venation is the characteristic features of monocots. Dicots possesses reticulate venation. The arrangementof veins on leaf is called venation.
Question 8
1 / -0

Which is not a function of leaves?

A
Photosynthesis

B
Formation of new buds

C
Transpiration

D
Gaseous exchange

Solution

Leaves perform the function of photosynthesis, exchange of gases and transpiration to loose excess of water. Formation of new buds is not a function of leaves.
Question 9
1 / -0

In Ocimum sanctum(tulsi), stem is

A
Round

B
Triangular

C
Quadrangular

D
None of these

Solution

The stem of Oscimum sanctum or tulsi is quadrangular in shape. The stem is covered with hairy projection.
Question 10
1 / -0

Bladders of Uricularia and Pitchers of Nepenthes are modification of

A
Flowers

B
Stems

C
Roots

D
Leaves

Solution

Bladders of Uricularia and Pitcher of Nepenthes are modification of leaves. They are modified to catch insects that is insectivorous plants.
Question 11
1 / -0

The flowers in the raceme/racemose are arranged

A
Acropetally

B
Basipetally

C
Centripeally

D
Centrifugally

Solution

Flowers are arranged in acropolis succession, i.e., older flowers are towards the base and younger ones are towards the apex of the peduncle.
In racemose inflorescence, there are 3 major divisions:
1) The main axis is elongated. It is sub-divided into raceme, spike, catkin, spadix.
2) The main axis is shortened. It is sub-divided into corymb and umbel.
3) The main axis is flattened. It is sub-divided into capitulum. In umbel and capitulum types, young flowers are in the centre and older ones are towards the periphery.
Question 12
1 / -0

Ament (Catkin) inflorescence is found in

A
Mulberry (Morus)

B
Populus (Poplar)

C
Acalypha (Cat's tail)

D
All of the above

Solution

Elongated cluster of unisexual flowers bearing scaly bracts and lacking petals is known as catkin inflorescence. Catkin (Ament) is a compact pendent unisexual spike in which peduncle is thin and weak. e.g., Morus (Mulberry), Populus (Poplar), Acalypha (Cats tail ), Salix (Willow), Betula (Birch).
Question 13
1 / -0

Find out the correct sequence of labelling of diagram given above.

A
A - spike, B - raceme, C - dichasial cyme, D - monochasial cyme

B
A - raceme, B - spike, C - monochasial cyme, D - dichasial cyme

C
A - dichasial cyme, B - monochasial cyme, C - raceme, D- spike

D
A - spike, B - dichasial cyme, C - monochasial cyme, D- raceme

E
A - raceme, B - dichasial cyme, C - spike, D - monochasial cyme

Solution

In raceme peduncle is elongated, flowers are pedicellate.
In spike, central axis is elongated but flowers are sessile.
In dichasial cyme, peduncle bears two bracts at a node from which two branches arise.
In monochasial cyme, single lateral branch arise from peduncle of old flower which terminates in flower. The lateral branch also terminates in flower.
Therefore, the correct answer is 'A-raceme, B-spike, C-monochasial cyme, D-dichasial cyme
Question 14
1 / -0

Five groups of extremely reduced male flowers, each group consisting of a single anther on a stem is found in which inflorescence ?

A
Cyathium

B
Dishasial cyme

C
Panicle

D
Verticillaster

Solution

Each cyathium is an inflorescence containing unisexual, apetalous male and female flowers. The inconspicuous male flowers occur in 5 clusters and are reduced to a single red stamen, while the single female flower consists of a single ovary (pistil) on a stalk (pedicel).
Question 15
1 / -0

Multicostate parallel type of venation is found in the leaves of

A
Grasses and Palms

B
Banana and Canna

C
Castor and China rose

D
Mango and Peepal

E
Castor and Tapioca

Solution

When a leaf has more than one midrib, then it is called as multicostate venation. In parallel venation, veins run parallel for the length of the leaf, from the base to the apex. Typically found in most monocotyledons, such as grasses, palms, castor etc.
Therefore, the correct option is A.
Question 16
1 / -0

Which of the following statements are correct?
(i) When a fruit develops from the inflorescence, it is composite.
(ii) Mesocarp is the edible part in apple.
(iii) Gynobasic style is seen in Ocimum.
(iv) Hypanthodium is a special type of inflorescence found in Euphorbia species.

A
(i) and (iv) are correct

B
(i) and (iii) are correct

C
(i) and (ii) are correct

D
(ii), (iii) and (iv) are correct

E
(ii) and (iv) are correct
Solution
- When fruit is formed from the entire inflorescence, like in pineapple, jackfruit, etc it is a composite fruit.
- Thalamus is the edible part of the apple.
- Gynobasic style is when style originates from the mid-basal part of the ovary, like in Ocimum.
- Cyathium is a special type of inflorescence found in Euphorbia species.
So, the correct answer is '(i) and (iii)'.
Question 17
1 / -0

In china rose, the inflorescence is

A
Cymose

B
Capitulum

C
Racemose

D
Solitary cyme

Solution

Solitary cyme is an inflorescence having only one flower. The tip of the peduncle ends in a flower. Peduncle shows no further growth. Solitary cyme may be axillary as in Hibiscus or terminal as in Datura and Gossypium.
Therefore, the correct answer is option D.
Question 18
1 / -0

The whorl of bracts inflorescence of Helianthus (sunflower) is

A
Involucre

B
Involucel

C
Stipule

D
Bract

Solution

In capitulum inflorescence, the whole cluster of florets is surrounded by a whorl of bracts collectively called involucre. The florets can be ray or disc florets.
Question 19
1 / -0

Cyathium is a type of

A
Fruit

B
Fungus

C
Alga

D
Inflorescence

Solution

Cyathium is a special type of inflorescence in which the involucre encloses a single female flower surrounded by many male flowers. e.g., Euphorbia.
Therefore, the correct option is D.
Question 20
1 / -0

Opening of flowers in the cymose inflorescence is

A
Acropetal

B
Centrifugal

C
Basipetal

D
Centripetal

Solution

Mosey (Oncidium irene ) belongs to family Orchidaceae. It is commonly known as dancing lady orchid. The flowers in the centre open first and those at the periphery open last.
Acropetal opening means opening of the flowers from base to apex in succession.
Basipetal opening means opening of the flowers from apex to base in succession.
Centripetal opening of flowers takes place in an inflorescence of many flowers as in sunflower which open in order from outside to the innermost.
Therefore, the correct answer is option B.

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Morphology of Flowering Plants Test -3

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Question 1

Petiole

Stipule

Lamina

Leaf base

Solution

Question 2

Stem

Fleshy leaves

Fruit

Root

Solution

Question 3

(iii), (v), (ii), (i), (iv)

(iii), (ii), (v), (i), (iv)

(iv), (i), (v), (iii), (ii)

(iv), (i), (v), (ii), (iii)

Solution

Question 4

Green succulent stems of indefinite growth

One internodes long stem

Leaf modifications

Modified petiole

Solution

Question 5

Santlum

Cuscuta

Drosera

Monotropa

Solution

Question 6

Distichous

Pentstichous

Octastichous

Tristichous

Solution

Question 7

Monocotyledons

Dicotyledons

Both a&b

None of these

Solution

Question 8

Photosynthesis

Formation of new buds

Transpiration

Gaseous exchange

Solution

Question 9

Round

Triangular

Quadrangular

None of these

Solution

Question 10

Flowers

Stems

Roots

Leaves

Solution

Question 11

Acropetally

Basipetally

Centripeally

Centrifugally

Solution

Question 12

Mulberry (Morus)

Populus (Poplar)

Acalypha (Cat's tail)

All of the above

Solution