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Plant Growth and Development · Question 74

AIPMT 2001MCQEasy📈 Topic in 0% papers+4−1
1

Which plant is LDP?

  1. Tobacco
  2. Glycine max
  3. Mirabilis jalapa
  4. Spinach

Answer

(4) Spinach

Solution

Long day plants (LDP) flower only when the photoperiod exceeds a critical day length.

⇒ Tobacco (Maryland Mammoth variety) and soybean ( Glycine max) are short day plants, while Mirabilis jalapa (four o'clock plant) flowers irrespective of day length (day-neutral).

∴ Spinach, which flowers in long days of summer, is a long day plant.

Answer: (4)

AIPMT 2001

Keep practising — Plant Growth and Development

2

Which of the following prevents the fall of fruits?

  1. GA3
  2. NAA
  3. Ethylene
  4. Zeatin
AIPMT 2001
3

Hormone responsible for senescence is

  1. ABA
  2. auxin
  3. GA
  4. cytokinin
AIPMT 2001
4

Which hormone breaks dormancy of potato tuber?

  1. Gibberellin
  2. IAA
  3. ABA
  4. Zeatin
AIPMT 2001
5

Proteinaceous pigment which controls the activities concerned with light is

  1. Carotenoids
  2. Phytochrome
  3. Chlorophyll
  4. Anthocyanin
AIPMT 2001
6

If the apical bud has been removed then we observe

  1. more lateral branches
  2. more axillary buds
  3. plant growing stops
  4. flowering stops
AIPMT 2000
7

By which action a seed coat becomes permeable to water?

  1. scarification
  2. stratification
  3. vernalization
  4. all of the above
AIPMT 2000
8

Which hormone is responsible for fruit ripening?

  1. Ethylene
  2. Auxin
  3. Ethyl chloride
  4. Cytokinin
AIPMT 2000
9

Coconut milk is used in tissue culture because it contains

  1. Auxin
  2. Gibberellin
  3. Ethylene
  4. Cytokinin
Out of syllabusAIPMT 2000

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