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Class 12 Biology Practice Test: Organisms and Populations - Responses to Abiotic Factors
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Related Test: Class 12 Biology Practice Test: Organisms and Populations - Major Abiotic Factors

Class 12 Biology Practice Test: Organisms and Populations - Responses to Abiotic Factors
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25 Questions

1. In which state do snails enter under unfavorable conditions?
2. What is maintaining the constancy of the internal environment called?
3. What is diapause?
4. In which of the following organisms various kinds of thick-walled spores which help them survive unfavorable conditions and germinate on the availability of suitable environment found?
5. Which alternative do the organisms have, if the stressful external conditions are localized or remain only for a short duration?
6. Which process do some snails and fishes undergo to prevent themselves from desiccation?
7. The Siberian cranes migrate to which National Park in India?
8. In what form does hibernation occur in animals?
9. Which structure in higher plants serves as a means to overcome a period of dormancy, stress and then helps in dispersal?
10. What do the desert lizards do when their body temperature drops?
11. In the below figure what does (B) line indicates?
The given diagram with B line indicates regulators that can maintain constant environment
12. According to evolutionary biologists why mammals are successful?
13. For which of the following organisms thermoregulation is energetically expensive?
14. In which of the following, organisms completely stop their metabolic activities?
15. For which of the following organisms thermoregulation is energetically expensive?
16. What are most of the invertebrates?
17. Which of the following organisms are capable of osmoregulation as well as thermoregulation?
18. In which state do zooplankton species in lakes and ponds enter under unfavorable conditions?
19. What organisms are able to maintain homeostasis which ensures a constant body temperature, constant osmotic concentration, etc., are called?
20. In which case, annual migration does not occur?
21. Heat loss or heat gain is the function of which area?
22. What is the suspension of metabolic activities during summer called?
23. What is the organism in which body temperature and the osmotic concentration of the body fluid changes with the ambient temperature and change with that of the ambient water osmotic concentration respectively called?
24. In which state do seeds enter under unfavorable conditions?
25. What are birds and mammals?

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