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Morphology of Flowering Plants · Question 45

NEET 2016 (Phase 2)MCQMedium📈 Topic in 62% papers+4−1
1

How many plants among Indigofera, Sesbania, Salvia, Allium, Aloe, mustard, groundnut, radish, gram and turnip have stamens with different lengths in their flowers?

  1. Three
  2. Four
  3. Five
  4. Six

Answer

(2) Four

Solution

As per NCERT, there may be a variation in the length of filaments within a flower, as in Salvia and mustard.

⇒ Salvia (Lamiaceae): didynamous — 2 long and 2 short stamens.

⇒ Mustard, radish and turnip (Brassicaceae): tetradynamous — 4 long and 2 short stamens.

∵ Indigofera, Sesbania, groundnut and gram (Fabaceae) have diadelphous stamens, and Allium and Aloe (Liliaceae) have six stamens in two whorls of equal length,

∴ plants with stamens of different lengths = Salvia, mustard, radish, turnip = 4.

Answer: (2)

NEET 2016 (Phase 2)

Keep practising — Morphology of Flowering Plants

2

Radial symmetry is found in the flowers of

  1. Brassica
  2. Trifolium
  3. Pisum
  4. Cassia.
NEET 2016 (Phase 2)
3

Free-central placentation is found in

  1. Dianthus
  2. Argemone
  3. Brassica
  4. Citrus.
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4

Among China rose, mustard, brinjal, potato, guava, cucumber, onion and tulip, how many plants have superior ovary?

  1. Three
  2. Four
  3. Five
  4. Six
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5

Axile placentation is present in

  1. pea
  2. Argemone
  3. Dianthus
  4. lemon.
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6

Roots play insignificant role in absorption of water in

  1. pea
  2. wheat
  3. sunflower
  4. Pistia.
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7

Perigynous flowers are found in

  1. China rose
  2. rose
  3. guava
  4. cucumber.
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8

Keel is the characteristic feature of flower of

  1. Aloe
  2. tomato
  3. tulip
  4. Indigofera.
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9

Leaves become modified into spines in

  1. onion
  2. silk cotton
  3. Opuntia
  4. pea
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10

[figure] is the floral formula of

  1. Petunia
  2. Brassica
  3. Allium
  4. Sesbania.
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11

The hilum is a scar on the

  1. seed, where funicle was attached
  2. fruit, where style was present
  3. fruit, where it was attached to pedicel
  4. seed, where micropyle was present
AIPMT 2015 (Cancelled)

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