Tag: life in water

Questions Related to life in water

Among hydrophytes, finely dissected leaves occur in

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Rooted floating leaved plants

  2. Submerged plants

  3. Emerged plants

  4. Free floating plants

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Correct Option: B

In submerged hydrophytes, the stomata occur

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. On lower surface

  2. On the upper surface

  3. No where

  4. On both the surfaces

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Correct Option: C

Mechanical tissue is undeveloped in 

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Xerophytes

  2. Hydrophytes

  3. Halophytes

  4. Mesophytes

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Correct Option: B

A characteristic feature of hydrophytes is

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Aerenchyma

  2. Well developed phloem

  3. Floating leaves

  4. Submerged leaves

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Correct Option: A
Explanation:

Aerenchyma is a spongy tissue that forms spaces or air channels in the leaves, stems and roots of submerged and aquatic plants. The floating leaves are there due to this feature of aerenchyma only. The aquatic plants or hydrophytes do not have submerged leaves or a well developed phloem, So the correct answer is 'Aerenchyma.'

Waxy coating on the surface of floating leaves prevents

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Respiration

  2. Photosynthesis

  3. Clogging of stomata

  4. Transpiration

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Correct Option: C

Submerged hydrophytes exchange gases through

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Stomata

  2. Hydathodes

  3. Lenticels

  4. General surface

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Correct Option: D

Hydrophyte with both hydrophytic and xerophytic traits is

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Agave

  2. Nerium

  3. Vallisneria

  4. None of the above

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Correct Option: D

Root cap is absent in

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Halophytes

  2. Hydrophytes

  3. Xerophytes

  4. Homophytes

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Correct Option: B

One of the following is not true for hydrophytes _____________.

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Vessels are usually absent

  2. Cuticle is poorly developed

  3. Tracheids are absent

  4. Air chambers are well developed

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Correct Option: C

Root system is poorly developed in

evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

  1. Hyphaene

  2. Hydrilla

  3. Halophytes

  4. Hygrophytes

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Correct Option: B