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Morphology of Flowering Plants · Question 53

AIPMT 2015 (Cancelled)MCQEasy📈 Topic in 12% papers+4−1
1

Leaves become modified into spines in

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

Answer

(3) Opuntia

Solution

As per NCERT, leaves are often modified to perform functions other than photosynthesis: they are converted into tendrils for climbing as in peas, or into spines for defence as in cacti.

⇒ Opuntia is a cactus; its leaves are reduced to spines, while the green flattened stem (phylloclade) photosynthesises.

⇒ Onion: fleshy leaves store food; pea: leaflets modified into tendrils; silk cotton: leaves are not spiny (the prickles on its trunk are outgrowths).

Answer: (3)

AIPMT 2015 (Cancelled)

Keep practising — Morphology of Flowering Plants

2

[figure] is the floral formula of

  1. Petunia
  2. Brassica
  3. Allium
  4. Sesbania.
AIPMT 2015 (Cancelled)
3

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)
4

Placenta and pericarp are both edible portions in

  1. apple
  2. banana
  3. tomato
  4. potato
AIPMT 2014
5

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

  1. vexillary
  2. imbricate
  3. twisted
  4. valvate.
AIPMT 2014
6

Which one of the following statements is correct?

  1. The seed in grasses is not endospermic.
  2. Mango is a parthenocarpic fruit.
  3. A proteinaceous aleurone layer is present in maize grain.
  4. A sterile pistil is called a staminode.
AIPMT 2014
7

An example of edible underground stem is

  1. carrot
  2. groundnut
  3. sweet potato
  4. potato.
AIPMT 2014
8

An aggregate fruit is one which develops from

  1. multicarpellary syncarpous gynoecium
  2. multicarpellary apocarpous gynoecium
  3. complete inflorescence
  4. multicarpellary superior ovary.
AIPMT 2014
9

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?

  1. Fifteen
  2. Eighteen
  3. Six
  4. Ten
NEET 2013
10

In China rose the flowers are

  1. zygomorphic, hypogynous with imbricate aestivation
  2. zygomorphic, epigynous with twisted aestivation
  3. actinomorphic, hypogynous with twisted aestivation
  4. actinomorphic, epigynous with valvate aestivation
NEET 2013
11

Seed coat is not thin, membranous in

  1. groundnut
  2. gram
  3. maize
  4. coconut.
NEET 2013

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