Home
Class 12
BIOLOGY
Assertion: Some orgainsms can maintain i...

Assertion: Some orgainsms can maintain internal homeostasis by means of physiological processes and are called "regulates."
Reason: Regulates can maintain internal homeostasis only up to a lilmit under stressful conditions.

A

If both Assertion and Reason are true and the reason is correct explanation of the assertion, then mark (1).

B

If both Assertion and Reason are true but the reason are true the reason is not the correct explanation of the assertion, then mark (2).

C

If Assertion is true but Reason is false, then mark (3).

D

If both Assertion and Reason are false, then mark (4).

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ORGANISMS AND POPULATIONS

    CENGAGE BIOLOGY|Exercise ARCHIVES (Choose the correct options)|28 Videos
  • MICROBES IN HUMAN WELFARE

    CENGAGE BIOLOGY|Exercise ARCHIVES|26 Videos
  • REPRODUCTION IN ORGANISMS

    CENGAGE BIOLOGY|Exercise ARCHIVES|8 Videos

Similar Questions

Explore conceptually related problems

Some organisms are able to maintain homeostasis by physiological (sometimes behavioural also) means which ensure constant body temperature, constant osmotic concentration, etc., are called

Organisms that can maintain a constant internal temperature are called as

Assertion : Process of maintaining a constant internal environment is known as homeostasis . Reason : Kidneys are excretory and homeostatic organs.

Nearly all plants and an overwhelming majority of animals are categorised as (A) Conformers - They can maintain a constant internal environment (B) Conformers - They cannot maintain a constant internal environment (C) Regulators - They can maintain a constant internal environment (D) Regulators - They cannot maintain a constant internal environment

Read the passage given below and answer the following questions: Reduction of carboxylic acids and their derivatives plays an important role in organic synthesis, in both laboratory and industrial processes. Traditionally, the reduction is performed using stochiometric amounts of hydride reagents, generating stochiometric amounts of waste. A much more attractive, atom-economical approach is a catalytic reaction using H_2 , however, hydrogenation of carboxylic acid derivatives under mild conditions is a very challenging task, with amides presenting the highest challenge among all classes of carbonyl compounds. Very few examples of the important hydrogenation of amides to amines, in which the C-O bond is cleaved with the liberation of water (Scheme 1), were reported. C-O cleavage of amides can also be affected with silanes as reducing agents. We have now prepared the new, dearomatized, bipyridine-based pincer complex 3, catalyst 3(Here refered as Cat. 3). Remarkably, it efficiently catalyzes the selective hydrogenation of amides to form amines and alcohols (eq 1). The reaction proceeds under mild pressure and neutral conditions, with no additives being required. Since the reaction proceeds well under anhydrous conditions, hydrolytic cleavage of the amide is not involved in this process. (Balaraman, E., Gnanaprakasam, B., Shimon, L. J., & Milstein, D. (2010). Direct hydrogenation of amides to alcohols and amines under mild conditions. Journal of the American Chemical Society, 132(47), 16756-16758.) In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage. Assertion: Aniline can be prepared from suitable amide using catalyst 3 Reason: The use of catalyst 3 is limited to aliphatic amides only.

Read the following statement carefully and give the answer :- (A) The organism try to maintain the constancy of its internal environment this process is called homeostasis (B) A very few lower vertebrate and invertebrate species are also indeed capable of regulation (C ) An overwhelming majority (99%) of animals and nearly all plant cannot maintain a constant internal enviroment (D) Some species have evolved the ability to conferm but only over a limited range of environment conditions beyond which they simply regulate

The regulation by an organism of chemical composition of its blood and body fluids and other aspects of its internal environment so that physiological processes can proceed at optimum rates is called

CENGAGE BIOLOGY-ORGANISMS AND POPULATIONS-ARCHIVES (Choose the correct options)
  1. Assertion: Some orgainsms can maintain internal homeostasis by means o...

    Text Solution

    |

  2. A high density of elephant population in an area can result in

    Text Solution

    |

  3. Two plants can be conclusively said to belong to the same species if t...

    Text Solution

    |

  4. The population of an insect species shows and explosive increase in n...

    Text Solution

    |

  5. Geometric representation of age structure is a characteristic of :

    Text Solution

    |

  6. What is true about the isolated small tribal populations ?

    Text Solution

    |

  7. In the case of peppered moth (Biston betularia) the black-coloured fro...

    Text Solution

    |

  8. Which one of the following is one of the characteristics of a biologic...

    Text Solution

    |

  9. The figure given below is a diagrammatic representation of response of...

    Text Solution

    |

  10. Which one of the following statements is correct for secondary success...

    Text Solution

    |

  11. Considered the following four conditions (A-D) and select the correct ...

    Text Solution

    |

  12. Large Woody vines are more commonly found in:

    Text Solution

    |

  13. What type of human population is represented by the following age pyra...

    Text Solution

    |

  14. People who have migrated from the planes to an area adjoining Rohtang ...

    Text Solution

    |

  15. Sacred groves are specially useful in

    Text Solution

    |

  16. A biologist studied the population of rats in a barn. He found that th...

    Text Solution

    |

  17. A sedentary sea anemone gets attached to the shell lining of hermit cr...

    Text Solution

    |

  18. If 20 J of energy is trapped at producer level, then how much energy w...

    Text Solution

    |

  19. Given below is a simplified model of phosphorus cycling in a terrestri...

    Text Solution

    |

  20. Just as a person moving from Delhi to Shimla to escape the heat for th...

    Text Solution

    |

  21. The zone of atmosphere in which the ozone layer is

    Text Solution

    |