Morphology of Flowering Plants — Page 5 | NEET Biology

Q41

Placentation in tomato and lemon is

A Parietal

B Free central

C Marginal

D Axile

Correct Answer

Option D

Solution

(d) Parietal - Ex.

Mustard; Free central - Ex.

Primula & Dianthus; Marginal - Ex.

Pea; Axile - Ex.

Tomato, lemon, China rose.

Q42

Inflorescence is racemose in

A Soyabean

B Brinjal

C Tulip

D Aloe

Correct Answer

Option A

Solution

(a) Inflorescence in family fabaceae (e.g., soyabean) is racemose.

Inflorescence in family liliaceae (e.g., tulip, Aloe) is solitary/cymose.

Inflorescence in family solanaceae (e.g., brinjal) is solitary, axillary or cymose.

Q43

In a cymose inflorescence the main axis

A Terminates in a flower

B Has unlimited growth

C Bears a solitary flower

D Has unlimited growth but lateral branches end in flowers

Correct Answer

Option A

Solution

(a) In cymose inflorescence, the growth of the main axis is definite because the growing point of peduncle is used up in the formation of a flower.

Q44

Among flowers of Calotropis, tulip, Sesbania, Asparagus, Colchicine, Sweet pea, Petunia, Indigofera, Mustard, Soyabean, Tobacco and groundnut how many plants have corolla with valvate aestivation?

A Five

B Six

C Seven

D Eight

Correct Answer

Option C

Solution

(c) Calotropis, tulip, Asparagus, colchicine, Petunia, mustard, tobacco have valvate aestivation while sweet pea, groundnut, soyabean, Indigofera, Sesbania have vexillary aestivation.

Q45

Among bitter gourd, mustard, brinjal, pumpkin, china rose, lupin, cucumber, sunhemp, gram, guava, bean, chilli, plum, petunia, tomato, rose, withania, potato, onion, aloe and tulip how many plants have hypogynous flower?

A Ten

B Fifteen

C Nineteen

D Six

Correct Answer

Option B

Solution

(b) Mustard, brinjal, china rose, lupin, gram, bean, chilli, Petunia, potato, tomato, Withania, onion, Aloe, tulip have hypogynous flower while bittergourd, cucumber, guava have epigynous flower and rose has perigynous flower.

Q46

When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as:

A Vexillary

B Imbricate

C Twisted

D Valvate

Correct Answer

Option B

Solution

(b) If the margins of sepals or petals overlap one another but not in any particular direction as in Cassia and gulmohur, the aestivation is called imbricate.

Q47

Axile placentation is present in

A Lemon and China rose

B Mustard and Argemone

C Dianthus and Primrose

D Sunflower and marigold

Correct Answer

Option A

Solution

(a) In a multilocular ovary, when the placenta is axial and ovules are attached to it is known as axile placentation.

Examples include lemon and china rose.

Q48

Perigynous flowers are found in :-

A Cucumber

B China rose

C Rose

D Guava

Correct Answer

Option C

Solution

(c) Ovary is partly superior and partly inferior in perigynous flower.

Q49

Proximal end of the filament of stamen is attached to the

A Anther

B Connective

C Placenta

D Thalamus or petal

Correct Answer

Option D

Solution

(d) The proximal end is attached to the thalamus whereas the distal end bears anther.

Q50

The standard petal of a papilionaceous corolla is also called

A Carina

B Pappus

C Vexillum

D Corona

Correct Answer

Option C

Solution

(c) Papilionaceous flowers are flowers with the characteristic irregular and butterfly-like corolla.

A single, large upper petal is known as the banner or vexillum.