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Morphology of Flowering Plants · Question 90

AIPMT 2010 (Mains)MCQEasy📈 Topic in 75% papers+4−1
1

Aestivation of petals in the flower of cotton is correctly shown in

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]

Answer

(2) [figure]

Solution

As per NCERT, in twisted aestivation one margin of each appendage overlaps that of the next one and so on, as in china rose, lady's finger and cotton.

(1) Petals only touch at the margins without overlapping ⇒ valvate.

(2) Each petal overlaps the next one in a regular direction ⇒ twisted.

(3) One large standard, two wings and two keel petals ⇒ vexillary.

(4) Overlapping not in any particular direction ⇒ imbricate.

∴ Cotton shows twisted aestivation, as in figure (2).

Answer: (2)

AIPMT 2010 (Mains)

Keep practising — Morphology of Flowering Plants

2

Keel is characteristic of the flowers of

  1. gulmohur
  2. Cassia
  3. Calotropis
  4. bean
AIPMT 2010 (Prelims)
3

Ovary is half-inferior in the flowers of

  1. guava
  2. plum
  3. brinjal
  4. cucumber
AIPMT 2010 (Prelims)
4

The technical term used for the androecium in a flower of China rose ( Hibiscus rosa-sinensis) is

  1. monadelphous
  2. diadelphous
  3. polyandrous
  4. polyadelphous
AIPMT 2010 (Prelims)
5

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?

  1. Cotyledon
  2. Endosperm
  3. Aleurone layer
  4. Plumule
AIPMT 2010 (Prelims)
6

A fruit developed from hypanthodium inflorescence is called

  1. sorosis
  2. syconus
  3. caryopsis
  4. hesperidium
AIPMT 2009
7

An example of axile placentation is

  1. Dianthus
  2. lemon
  3. marigold
  4. Argemone
AIPMT 2009
8

Cotyledons and testa respectively are edible parts in

  1. walnut and tamarind
  2. french bean and coconut
  3. cashew nut and litchi
  4. groundnut and pomegranate
AIPMT 2009
9

An example of a seed with endosperm, perisperm, and caruncle is

  1. coffee
  2. lily
  3. castor
  4. cotton
AIPMT 2009
10

The floral formula [figure] is that of

  1. soybean
  2. sunhemp
  3. tobacco
  4. tulip
AIPMT 2009
11

Vegetative propagation in mint occurs by

  1. offset
  2. rhizome
  3. sucker
  4. runner.
AIPMT 2009

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