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

Mechanical tissue is best developed in

  1. Hydrophytes

  2. Halophytes

  3. Xerophytes

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

Mechanical tissues (like sclerenchyma) are highly developed in xerophytes to provide structural support and prevent wilting in the absence of high turgor pressure.

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

Sunken stomata occur in

  1. Xerophytes

  2. Hydrophytes

  3. Mesophytes

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

Sunken stomata are a specific adaptation in xerophytes to create a micro-environment of higher humidity around the pore, thereby reducing the rate of transpiration.

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 a xerophytic plant in which the stem is modified into a flat green and succulent structure?

  1. Casuarina

  2. Opuntia

  3. Hydrilla

  4. Acacia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Opuntia is a plant growing in dry and xeric habitats and it has a stem containing several nodes and internodes. It is modified into a flat, fleshy and thick green leaf-like structure called phylloclade. which performs the functions of photosynthesis. The leaves gets modified into spines to help in reducing transpiration.
Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

An adaptation of plants to water scarcity and high temperature is

  1. Succulent stem stores water

  2. Poorly developed root

  3. They shed their leaves

  4. In unfavourable season, plants survive in dormant state as seeds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Water storage in stem and tubers is an adaptation of plants to thrive in harsh environments with high temperatures and scarce water. Such plants called xerophytes usually develop succulent stems that can store water.
  • They have a very extensive root system to absorb the maximum amount of water from the soil.
  • Other adaptations include thick waxy cuticle, reduced leaf size, densely packed leaves, reduced number of stomata in pitted and grooved positions.
Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

Vegetation of geographic region with low rainfall, high temperature, loose and sandy soil is of the type called

  1. Grassland

  2. Scrub forest

  3. Xerophytic

  4. Evergreen tropical forest
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vegetation of geographic region with low rainfall, high temperature, loose and sandy soil is of the type called xerophytic vegetation. It consists of spiny shrub, cactus. Caatinga is a type of xerophytic vegetation.

Thus, the correct answer is 'Xerophytic.'

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 an example of adaption in Xerophyte:

  1. CAM pathway

  2. Thick cuticle

  3. Absence of stomata

  4. Leaves reduces to spine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A xerophyte is the species of plants, that has the special characters to adapt in the environment with little water. Xerophytes plant have a thick waxy cuticle on the stem and leaves. This waxy cuticle reduces the water evaporation. In xerophytic plants, sunken stomata are present. which open during the night to prevent the water loss. To adapt in this environment, xerophytic plants leaves reduces into spines, which reduces the surface area of the leaf and reduces the amount of transpiration. The xerophytic plant makes their food through the CAM pathway.

So, the option is ' Absence of stomata '

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

Opuntia has spine like leaves which help in 

  1. Reducing the rate of transpiration

  2. Increasing the rate of transpiration

  3. Increasing the rate of photosynthesis

  4. Reducing the rate of photosynthesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Opuntia has spine which are highly modified leaves. Spines help prevent water loss by reducing the rate of transpiration.
So, the correct option is 'Reducing the rate of transpiration'
Multiple choice botany ecological adaptations, succession and ecological services extreme adaptations adapting to a habit adaptive features aquatic plant adaptations pollination through water

'Pebble plant' have _____________.

  1. Leaves modified to spines

  2. Leaves are absent

  3. Leaves are swollen

  4. Leaves modified to reduce transpiration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lithops (stone-faced as the plants appear stone-like)  is a genus of succulent plants in the ice plant family, Aizoaceae. They avoid being eaten by blending in with surrounding rocks and are often known as pebble plants or living stones. These are small succulent plants that survive in their harsh environment by having much of the plant body below ground. Each individual plant consists of two succulent leaves fused together in the shape of an inverted cone (although some species will produce multi-headed plants). The fissure at the top of the plant is the division between the two leaves and is spine-like. 

So, the correct answer is 'leaves modified to spines'.