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Morphology of Flowering Plants · Question 86

AIPMT 2010 (Mains)MCQEasy📈 Topic in 25% papers+4−1
1

Which one of the following is a xerophytic plant in which the stem is modified into the flat green and succulent structure?

  1. Opuntia
  2. Casuarina
  3. Hydrilla
  4. Acacia

Answer

(1) Opuntia

Solution

As per NCERT, some plants of arid regions modify their stems into flattened ( Opuntia) or fleshy cylindrical ( Euphorbia) structures; they contain chlorophyll and carry out photosynthesis.

⇒ Such a flat, green, succulent stem is a phylloclade, seen in the xerophyte Opuntia.

∵ Hydrilla is a hydrophyte, and Casuarina and Acacia do not have flat succulent stems,

∴ the plant is Opuntia.

Answer: (1)

AIPMT 2010 (Mains)

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2

The correct floral formula of soyabean is

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2010 (Mains)
3

Consider the following four statements (i), (ii), (iii) and (iv) and select the right option for two correct statements. Statements : (i) In vexillary aestivation, the large posterior petal is called standard, two lateral ones are wings and two small anterior petals are termed keel. (ii) The floral formula for Liliaceae is [figure] (iii) In pea flower the stamens are monadelphous. (iv) The floral formula for Solanaceae is [figure] The correct statements are

  1. (i) and (iii)
  2. (i) and (ii)
  3. (ii) and (iii)
  4. (iii) and (iv)
AIPMT 2010 (Mains)
4

Vegetative propagation in Pistia occurs by

  1. stolon
  2. offset
  3. runner
  4. sucker
AIPMT 2010 (Mains)
5

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2010 (Mains)
6

Keel is characteristic of the flowers of

  1. gulmohur
  2. Cassia
  3. Calotropis
  4. bean
AIPMT 2010 (Prelims)
7

Ovary is half-inferior in the flowers of

  1. guava
  2. plum
  3. brinjal
  4. cucumber
AIPMT 2010 (Prelims)
8

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)
9

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)
10

A fruit developed from hypanthodium inflorescence is called

  1. sorosis
  2. syconus
  3. caryopsis
  4. hesperidium
AIPMT 2009
11

An example of axile placentation is

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

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