Tag: extreme adaptations

Questions Related to extreme adaptations

Consider the following statements (A) - (D) each with one or two blanks.
(A) Bears go into (a) during winter to (b) cold weather.
(B) A conical age pyramid with a broad base represents (c) human population.
(C) A wasp pollinating a fig flower is an example of (d)
(D) All area with high levels of species richness is known as (e) 
Which one of the following options gives the correct fill ups to the respective blank numbers from (a) to (e) in the statements.

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

  1. (b)- Stable, (d)- Commensalism, (a)- Mesh

  2. (a)- Aestivation, (d)- Escape, (c)- Stable, (d)- Mutualism

  3. (c)- Expanding, (d)- Commensalism, (e)- Biodiversity park

  4. (a)- Hibernation, (b)- Escape, (c)- Expanding, (d)- Obligate mutualism

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Correct Option: D
Explanation:

Bears usually go into hibernation (a) during winter to escape (b) cold weather. (Hibernation is a state of inactivity and metabolic depression in endotherms. Hibernation refers to a season of heterothermy that is characterized by low body temperature, slow breathing and heart rate, and low metabolic rate.)

A conical age pyramid with a broad base represents expanding (c) human population. It shows high population growth.
A wasp pollinating a fig flower is an example of obligate mutualism (d). (It is a type of mutualism in which the species involved are in close proximity and interdependent with one another in a way that one cannot survive without the other.)
All area with high levels of species richness is known as biodiversity park (e).
Therefore, the correct answer is option D.

The biological adaptation that allows frogs to obtain water for their survival during conditions of water scarcity is the

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

  1. Presence of modified tongue that acts like a sponge to suck water from damp soils

  2. Presence of water channels in the skin by which they absorb water from their surroundings

  3. Presence of ciliated oesophagus that helps in separating water from ingested particular matter

  4. Selective feeding on plants with large amount of water that would fulfill the water requirement

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Correct Option: B
Explanation:

In the conditions of water scarcity, the frogs show biological adaptation to reduce water loss or obtain water from the surroundings. The skin is modified to contain water channels. The water is absorbed from the surroundings through the skin and the water channels makes the water available for the survival. 

Thus, the correct answer is option B. 

Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of :-

botany living organisms and their surroundings aquatic plant adaptations pollination through water extreme adaptations

  1. Hydrophytes

  2. Xerophytes

  3. Mesophytes

  4. Epiphytes.

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Correct Option: A
Explanation:

Answer is option A i.e. "Hydrophytes"
Hydrophytes are aquatic plants that live in aquatic environments either completely or partially submerged in water. As an adaptation, their vascular tissue and mechanical tissue are reduced. The cuticle is either completely absent or it is reduced, thin and poorly developed.
On contrary, xerophytes have heavy cuticle, vascular tissue and mechanical tissue. Mesophytes have moderate vascular tissue, mechanical tissue and cuticle and epiphytes are lower plants or mosses that live in marine environment, they are non-vascular.