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Morphology of Flowering Plants

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

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)

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Ques. 2AIPMT 2010 (Mains)

The correct floral formula of soyabean is

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

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)
Ques. 4AIPMT 2010 (Mains)

Vegetative propagation in Pistia occurs by

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

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

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

Keel is characteristic of the flowers of

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

Ovary is half-inferior in the flowers of

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

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
Ques. 9AIPMT 2010 (Prelims)

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
Ques. 10AIPMT 2009

A fruit developed from hypanthodium inflorescence is called

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

An example of axile placentation is

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

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