Tag: extreme adaptations

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Questions Related to extreme adaptations

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

Which is the trait that enabled the plants for the first time to colonise themselves on dry land?

  1. Lignified cell wall

  2. Vascular tissue

  3. Cuticle

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

The cuticle is a waxy coating over the surface of leaves and plants. It forms a waterproof coating over the surface of leaves and plants. It prevents water loss from plants and also prevents the plants from getting desiccated. It also prevents the intake of gases into the plants. 

So, option C "Cuticle" is the correct answer.

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

In cacti, the succulence is mostly in 

  1. Stem

  2. Leaves

  3. Roots

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In cacti, the succulence is mostly in the stems because the leaves of the cacti are reduced to thrones to minimize the surface areas and therefor the water evaporation through them. the cacti have a shallow widespread network of roots that enables them to absorb water, therefore the roots are not succulent. the cacti have thick stems that store maximum amount of water in the entire plant. So, the correct answer is 'Stem'.

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

Phreatophytes are xerophytes with roots

  1. Spread along the soil surface

  2. Well spread in the soil

  3. Very deep reaching ground water fringe

  4. Very deep but well above ground water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A phreatophyte is a deep-rooted plant that obtains a significant portion of the water that it needs from the phreatic zone (zone of saturation) or the capillary fringe above the phreatic zone. Phreatophytes are plants that are supplied with surface water and often have their roots constantly in touch with moisture. These plants have very deep roots that are able to reach the water table. So the correct answer is ' Very deep reaching ground water fringe'. 

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

Drought endurers are

  1. Succulent xerophytes

  2. Perennial xerophytes

  3. Annual xerophytes

  4. Both B and C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Drought endurers are plants that can survive drought periods by maintaining their physiological functions, typically through deep root systems or water storage, and are usually perennial. Annuals are typically drought escapers.

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

In xerophytic leaf, the stomata are situated 

  1. On both surface

  2. On upper surface

  3. On lower surface

  4. Absend from both surfaces
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The xerophytic plants are the plants present in the desert and other dry environments. The rate of transpiration is high in xerophytic plants due to high temperatures. In order to minimize the rate of transpiration, they have sunken stomata.

Thus, the correct answer is option (C),

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

Ephemeral xerophytes grow during 

  1. Winter

  2. Spring

  3. Rainy season

  4. All the seasons
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ephemeral xerophytes are drought escapers that complete their entire life cycle very quickly during the short rainy season, remaining as seeds during the dry periods.

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

Lamina is reduced in

  1. Xerophytes

  2. Mesophytes

  3. Hydrophytes

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

Lamina is reduced in xerophytic plants. In xerophytes, the petiole is modified into expanded green structure which carries out photosynthesis in case of reduced lamina.  For example, in Australian acacia.

Thus, the correct answer is 'Xerophytes.'

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

Which one is a exclusive xerophytic adaptation?

  1. Absence of stomata

  2. Long tap root system

  3. Stipular leaves

  4. Spines
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

While many plants have spines or stipular leaves, a long tap root system is a classic, primary adaptation in many xerophytes to reach deep groundwater sources in arid environments.

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

A physiological xerophyte is

  1. Salicornia

  2. Euphorbia

  3. Salvia

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

Physiological xerophytes are plants that grow in saline soils (halophytes) where water is present but physiologically unavailable due to high osmotic pressure, making them appear xerophytic. Salicornia is a classic example.

Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

Which of the following is not a character of xerophytes?

  1. Thick cuticle

  2. Well developed mechanical tissue

  3. Well developed conducting tissues

  4. Spongy parenchyma
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Xerophytes are the plants that survive in an environment having little supply of water or moisture. To survive with limited water supply they have anatomical modifications such as-

1) The epidermis is covered with thick cuticle to prevent water loss by transpiration.
2) Waxy coating is present on leaves and stem to prevent transpiration losses and stomata are generally confined on the lower surface of the epidermis of leaves.
3) Mechanical and vascular tissues are well developed.
4) The xerophytes have abundant palisade parenchyma and limited spongy parenchyma.
So, the correct answer is 'Spongy parenchyma'.