Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Biology : Organisms and Populations

One Word Answers

11. Coin one word for the following statements :

1.Organism that can tolerate only a narrow range of salinity.

2. Plants that can survive a wide range of temperature.

3. Interaction of two species in which one is benefited while other is neither benefited nor harmed.

4. Number of births during a given period in the population that are added to the initial density.

5. the process of maintaing a constant body temperature.

139 Views

Fill In the Blanks

12. A few organisms can tolerate and thrive in a wide range of temperature, they are called........................

280 Views

13. Majority of organisms are restricted to a narrow range of temperature, such organisms are called ........................

238 Views

14. The organisms ideally try to maintain the constancy of its internal environment by the process called........................

134 Views

15. Mammals from colder climates have shorter ears and limbs to minimize heat loss. This rule is called........................

434 Views

16. The parasites that feed on external surface of host organisms are called ........................

239 Views

17. The parasites that live inside the body at different sites (liver, kidney, lungs, RBC etc.) are called........................

116 Views

One Word Answers

18. List two negative interactions between two species.

127 Views

19. What is the term for cryptic-colouring in organisms to avoid being detected easily by the predator
?

116 Views

20. Give an example of commensal relationship.

115 Views