Tag: extreme adaptations

Quizzes (0) Questions (113)

Questions Related to extreme adaptations

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

Submerged hydrophytes have commonly dissected leaves for

  1. Decreasing surface area

  2. Increasing surface area

  3. Reducing effect of water currents

  4. Increasing number of stomata
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Finely dissected leaves in submerged hydrophytes help reduce the surface area exposed to water currents, preventing the plant from being damaged or uprooted by moving water.

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

Hydrilla is

  1. Phytoplankton

  2. Floating hydrophyte

  3. Submerged hydrophyte

  4. Amphibian
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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.

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

P is correct because many aquatic plants have leaves or organs that float. Q is incorrect because air gaps in aquatic plants occur in aerenchyma tissue, not collenchyma.

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

Large sized rooted plants founds in shallow waters are called 

  1. Macrophytes

  2. Microphytes

  3. Phagophytes

  4. Saprophytes
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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.

  1. iii, iv

  2. ii, iii

  3. i, iv

  4. i, iii
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vallisneria uses hydrophily (pollination by water) and has long-stalked female flowers. Casuarina is a xerophyte with phylloclades (or cladodes). Hydrilla is a submerged hydrophyte with aerenchyma. Tribulus is an annual but not typically classified as a root succulent.

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

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

  1. Ceratophyllum

  2. Najas

  3. Trapa

  4. Utricularia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ceratophyllum (hornwort) is a free-floating hydrophyte with roots that anchor in mud at the bottom while leaves float on or near the water surface. Najas is completely submerged, Trapa (water chestnut) has floating leaves but different growth form, and Utricularia (bladderwort) is also typically submerged or free-floating. The key distinction is Ceratophyllum's mud-anchored roots with floating foliage.