Ecology and Environment

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Across
  1. 2. _______’s competitive exclusion principle states that no two species can occupy same niche at the same time(5)
  2. 4. Animals that are adapted to the desert climate(9)
  3. 6. Organisms that can tolerate a wide range of salinities
  4. 7. A process in which water soluble inorganic nuatrients go down into the soil horizon and get precipitated as unavailable salts(8)
  5. 11. Pertains to a factor which is defined as”the more or less loose and friable material in which by means of their roots plants may or do find a foothold and nourishment as well as other conditions of growth”(7)
  6. 12. Plants growing in rock crevices(12)
  7. 14. The stable community during an ecological succession that would be near equilibrium with the environment(5,9)
  8. 15. characteristic form of behavior among social animals in which one or several organisms sacrifice their own interests for the welfare of the community(8)
  9. 17. Rate of assimilation of the food energy at the level of consumers(9,12)
  10. 19. The first group of organisms establishing during an ecological succession(8)
  11. 21. Some organisms avoid unfavourable climate by escaping in time. The stage of suspended development entered by organisms such as zooplanktons is(8)
  12. 22. The study of interaction of an individual with the environment(10)
Down
  1. 1. Ecological pyramids were developed by(7,5)
  2. 3. Organisms that can tolerate only a narrow range of temperature
  3. 5. ______’s rule states that “the tail,snout,ear and legs of mammals are relatively shorter in colder areas than in warmer areas”(5)
  4. 8. A species that tolerates a wider range of temperature(9,10)
  5. 9. defined as number of individuals of a species at a given area at a given time(10,7)
  6. 10. A species of birds that shows brood parasitism6)
  7. 13. Two organisms are mutually benefitted by each other but the association is non-obligatory(16)
  8. 16. Dead plant and animal remains,including fecal matter(8)
  9. 18. Besides the direct lethal effects of fire in plants, it has other indirect effects, such as the stimulating effect. This species of plant grows under the stimulation of fire(9)
  10. 20. Specific part of habitat occupied by individuals of a species and their functional role in it(5)