Tag: aquatic adaptation

Questions Related to aquatic adaptation

Petioles are inflated in floating hydrophytes 

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

  1. Wolffia

  2. Eichhornia

  3. Salvinia

  4. Ceratophyllum

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Correct Option: B
Explanation:

The petiole is the stalk that attaches the leaf blade to the stem. Water hyacinth leaves in natural populations vary from being long and thin‐petioled to being short with inflated petioles. water hyacinth is a floating hydrophyte that has an inflated petiole which helps in keeping it on top of the water level thus allowing it not to sink. So the correct answer is ' Eichhornia or water hyacinth. '

A rooted floating leaved hydrophyte is

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

  1. Nymphaea

  2. Hydrilla

  3. Ceratophyllum

  4. Eichhornia

Show answer
Correct Option: A
Explanation:
Rooted Hydrophytes with Floating Leaves:
The roots of these type of hydrophytes are fixed in mud, but leaves have long
petioles which keep them floating on the water surface. Except leaves, the restof the plant body remains in water. Some examples are Nelumbo nucifera,
Nymphaea stellate (water lily), Trapa, Marsilea. 
So the correct answer is 'Nymphaea'. 

Which of the following is incorrect?

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

  1. Herbarium houses dried, pressed and preserved plant specimens.

  2. John Ray developed key for the identification of animals.

  3. The category division is used instead of phylum in case of plants which comprises of fewer similar features.

  4. The set of methods used in classification based on evolutionary relationship is called phenetics.

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Correct Option: D
Explanation:

The statement- the set of methods used in classification based on evolutionary relationship is called phenetics is wrong.

Phenetics is an attempt to classify organisms based an overall similarity usually in morphology or other observable traits regardless of their phylogeny of evolutionary relation.