Tag: extreme adaptations

Questions Related to extreme adaptations

Characteristic of hydrophytes is

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

  1. Poorly developed roots

  2. Well developed roots

  3. Well developed xylem

  4. Stem with sclerenchyma

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Correct Option: A

Submerged hydrophytes have commonly dissected leaves for

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

  1. Decreasing surface area

  2. Increasing surface area

  3. Reducing effect of water currents

  4. Increasing number of stomata

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Correct Option: C

Hydrilla is

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

  1. Phytoplankton

  2. Floating hydrophyte

  3. Submerged hydrophyte

  4. Amphibian

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Correct Option: C
Explanation:

Hydrophytes are aquatic plants that live in water and are evolutionarily suited to thrive in aquatic environments. Hydrilla, also called waterthyme is a submerged hydrophyte, which is a troublesome aquatic weed at many places.

Which one of the following is a hydrophyte?

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

  1. Atistida

  2. Certophyllum

  3. Carthamus

  4. Pedilanthus

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Correct Option: A

Select the correct answers for P and Q :
P. Many organs of aquatic plants float in water
Q. Large air gaps occur in the collenchymatous tissue.

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

  1. Q is correct, P is wrong

  2. P is correct, Q is wrong

  3. Both P and Q are correct

  4. Both P and Q are wrong

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Correct Option: B

Large sized rooted plants founds in shallow waters are called 

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

  1. Macrophytes

  2. Microphytes

  3. Phagophytes

  4. Saprophytes

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Correct Option: A
Explanation:

The plants which can live only in water are called hydrophytes. Among these hydrophytes, there are different sizes and classification based on them. The large sized hydrophytes are called macrophytes. As macro suggests large size.

So, option A is the correct answer.

Identify the correct pair of combinations :


(i) Vallisneria - Long stalked female flowers - Hydrophily
(ii) Tribulus - Annual - Root succulent
(iii) Hydrilla - Submerged rooted hydrophyte -  Aerenchyma
(iv) Casuarine - Perennial - Phylloclades.

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

  1. iii, iv

  2. ii, iii

  3. i, iv

  4. i, iii

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Correct Option: C

Who divided plants into hydrophytes, xerophytes and mesophytes?

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

  1. Shantz

  2. Warming

  3. Clements

  4. Odum

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Correct Option: A

Plants growing on damp (shady) places are ______________.

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

  1. Hydrophytes

  2. Hygrophytes

  3. Mesophytes

  4. Phreatophytes

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Correct Option: A

Which one of the following hydrophytes has its roots fixed in mud and leaves floating on water?

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

  1. Ceratophyllum

  2. Najas

  3. Trapa

  4. Utricularia

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Correct Option: A