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[A] : Stenothermal species can tolerate ...

[A] : Stenothermal species can tolerate narrow range of temperatures .
[R] : Geographic races of a species inhabiting cold regions are much smaller than the forms inhabiting the warmer regions .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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Species that can tolerate narrow range of temperature are called……….

The different forms of interbreeding species that live in different geographical regions are called

Study the following statements and select the correct ones. (i) Organisms capable to tolerate a wide range of temperature are called stenothermal organisms. (ii) Thermal tolerance of different species determine their grographical distribution to a large extent (iii) Avarge temperature in tropical deserts in summer is lt 50^(@)C . (iv) Thermal springs cannot sustain life due to very high average temperature i.e., gt 100^(@)C .

Statement (s ) : Populations of a species inhabiting different geographical areas are in a continuous process of adaptation to their surrounding environments and this leads to the evolution of species. Reason (R ) : Geographical barriers obstruct interbreeding of populations of a species leading to reproductive isolation and evolution of new species.

The range of tolerance to the variations in each environmental factor varies greatly in different species . Name the terms used for species (i) Which live in regions of nearly uniform temperature throughout the year and showing narrow range to tolerance to temperature changes . (ii) which live in areas where temperature changes significantly at different times of the year and showing wide range of tolerance to temperature changes .

Classify Rohu, Scoliodon, flying lizard, king kobra, frog, salamander, ostrich, pigeon, bat, crocodile and whale into the cold blooded/warm blooded animals. Cold blooded creatures take on the temperature of their surroundings. They are hot when their environment is hot and cold when their environment is cold. In hot environments, cold-blooded animals can have blood that is much warmer than warm-blooded animals. Cold-blooded animals are much more active in warm environments and are very sluggish in cold environments. This is because their muscle activity depends on chemical reactions which run quickly when it is hot and slowly when it is cold. A cold-blooded animal can convert much more of its food into body mass compared with a warm-blooded animal. e.g., Rohu, flying lizard. Warm blooded Warm-blooded creatures, like mammals and birds, try to keep their bodies at a constant temperature. They do this by generating their own heat when they are in a cooler environment, and by cooling themselves when they are in a hotter environment. To generate heat, warm-blooded animals convert the food that they eat into energy. Their have to eat a lot of food, compared with cold-blooded animals, to maintain a constant body temperature. Only a small of the food that a warm-blood animal eats is converted into body mass. The rest is used to fuel a constant body temperature. e.g., Scoliodon, ostrich, pigeon, bat and whale.

TRUEMAN BIOLOGY-Ecology -ASSERTION AND REASON
  1. [A] : Natural populations are capable of an enormous and rapid increas...

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  2. [A] : In mutualism both the individuals are benefitted . [R] : Both ...

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  3. [A] : Stenothermal species can tolerate narrow range of temperatures ....

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  4. [A] Eurythermic plants can withstand wide range of temperature . [R...

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  5. [A] : Light is the energy which is stored as chemical energy in the fo...

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  6. [A] : Flora and Fauna of different parts of the world do not show unif...

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  7. [A] : A species is an interbreeding population which is reproductively...

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  8. [A] : Mimicry is a device adopted to protect the organism from its ene...

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  9. [A] : Biological magnification is concentration of substances instead ...

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  10. [A] : The rate of energy storage at consumer levels are referred to as...

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  11. [A] : Primary productivity is shown by green plants only . [R] : Pri...

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  12. [A] : Energy pyramid is sloping . [R] : The energy of one trophic le...

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  13. [A] : The biotic community and the non living enviroment of an ara fun...

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  14. [A] :Green plants ara secondary consumers [R]: Microconsumers break...

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  15. [A] : A food chain is a group of organism in which there is a transfer...

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  16. [A] : Food chains are not paths of energy flow throgh and ecosysterm. ...

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  17. [A] : There is a grudual increase in the energy content at successive ...

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  18. [A] : There is a gradual increase in the energy content at successive ...

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  19. [A] : Carbon monoxide is poisonous . [R] : It destroys RBC .

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  20. [A] : An estimation of B.O.D gives an indication of the amount of poll...

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