Tag: extreme adaptations

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Questions Related to extreme adaptations

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

Shade plants have low

  1. Photosynthetic activity

  2. Respiratory rate

  3. Metabolic activity

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

Shade plants (sciophytes) are adapted to low-light environments, which results in lower overall metabolic rates, including reduced photosynthetic and respiratory activity compared to sun-loving plants. Because they operate at lower energy levels, all these metabolic processes are typically lower.

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

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

  1. Spines

  2. Bending towards opposite side

  3. Sclerenchymatous tissue that provides extra mechanical support

  4. Tearing of corners while the middle remains saved
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Desert plants often develop sclerenchymatous tissues, which are rigid, dead cells that provide significant mechanical strength and structural support. This reinforcement helps the leaves withstand high wind velocities without tearing.

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

Sun plants have

  1. More mechanical tissues

  2. Extensive root system

  3. Abundant flowering

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

Sun plants (heliophytes) are adapted to high-light environments and typically possess more mechanical tissue for structural integrity, extensive root systems to support high transpiration rates, and often show more vigorous growth and flowering compared to shade plants.

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

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 ________ .

  1. aestivation, miigration

  2. migration, hibernation

  3. asetivation, hibernation

  4. hibernation, asetivation
Reveal answer Fill a bubble to check yourself
A,C Correct answer
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. 

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

Many tribes living in high altitudes of Himalayas have 

  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.
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

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

  1. Mammals requiring small territories

  2. Planktons showing diapause

  3. Animals with migratory habits

  4. Birds requiring small territories
Reveal answer Fill a bubble to check yourself
C Correct answer
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.'

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

During adverse season, 'therophytes' survive by

  1. Bulbs

  2. Tubers

  3. Rhizomes

  4. Seeds
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

' Pebble plant ' have 

  1. Leave 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 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