Tag: extreme adaptations

Questions Related to extreme adaptations

Shade plants have low

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. Photosynthetic activity

  2. Respiratory rate

  3. Metabolic activity

  4. All of the above

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Correct Option: D

The leaves of desert plants are not torn away by high wind velocity because of

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. Spines

  2. Bending towards opposite side

  3. Sclerenchymatous tissue that provides extra mechanical support

  4. Tearing of corners while the middle remains saved

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Correct Option: C

Sun plants have

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. More mechanical tissues

  2. Extensive root system

  3. Abundant flowering

  4. All of the above

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Correct Option: D

Sun loving plants are

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. Halophytes

  2. Sciophytes

  3. Heliophytes

  4. Autotrophs

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Correct Option: C

Plants adapted to grow in shade are

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. Psammophytes

  2. Sciophytes

  3. Mesophytes

  4. Xerophytes

Show answer
Correct Option: B

Organisms may avoid stressful conditions by suspending their activities for sometime.If they do it to avoid high temperature it is called________ and if they do it to avoid low temperature then it is called ________ .

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. aestivation, miigration

  2. migration, hibernation

  3. asetivation, hibernation

  4. hibernation, asetivation

Show answer
Correct Option: A,C
Explanation:

Various organisms, if unable to migrate, might avoid the unfavorable environment by escaping in time. Polar bears go into hibernation during winter seasons to escape extreme cold. Some snails and fish undergo aestivastion to avoid summer-related problems like heat and desiccation, etc. 

Many tribes living in high altitudes of Himalayas have 

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. High WBC count than people living in plains.

  2. Lower WBC count than people living in plains.

  3. Higher RBC count than people living in plains.

  4. Both RBC and WBC counts are lower than people living plains.

Show answer
Correct Option: C
Explanation:

As the altitude increases, the atmospheric pressure decreases. Thus reducing the level of oxygen. People living at higher altitudes are used to the lower density of oxygen molecules in the air. They have higher levels of haemoglobin (red blood cells) in their blood which helps them to take in more oxygen. In contrast, people living at lower altitudes have lesser haemoglobin concentrations as they experience a higher density of oxygen molecules in the air.


So, the correct answer is 'C'.

Which of the following organisms are badly affected when large habitats are broken up into small fragment due to various human activities?

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. Mammals requiring small territories

  2. Planktons showing diapause

  3. Animals with migratory habits

  4. Birds requiring small territories

Show answer
Correct Option: C
Explanation:

There are various causes of biodiversity losses. One of the reason is habitat loss and fragmentation. When large habitats are broken up into small fragments due to various human activities, mammals and birds requiring large territories and animals with migratory habits are badly affected. This results in the decline in their population.

Thus, the correct answer is 'Animals with migratory habits.'

During adverse season, 'therophytes' survive by

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. Bulbs

  2. Tubers

  3. Rhizomes

  4. Seeds

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Correct Option: D
Explanation:
A. Bulbs are the modification of underground stems. They consist of a reduced discoid stem and several fleshy scales.
B. Tubers are the swollen underground stem developed at the growing tip of a branch.
C. Rhizomes are perennial, fleshy, dorsiventral and horizontal underground stem growing beneath the surface of the soil.
D. Seeds are small embryonic plants enclosed in a covering called the seed coat, usually with some stored food. Therophytes are the plants that can survive unfavorable conditions as seeds and germinate when conditions are favorable.
So, the correct answer is 'Seeds'.

' Pebble plant ' have 

biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

  1. Leave modified to spines

  2. Leaves are absent

  3. Leaves are swollen

  4. Leaves modified to reduce transpiration

Show answer
Correct Option: A
Explanation:

Lithops plants or Pebble plant consist of one or more pairs of bulbous, almost fused leaves opposite to each other and hardly any stem. The slit between the leaves contains the meristem and produces flowers and new leaves. The leaves of Lithops are mostly buried below the surface of the soil, with a partially or completely translucent top surface known as a leaf window which allows light to enter the interior of the leaves for photosynthesis. 

So the above selected option is correct