Organism and population 

One mark questions: 

1. Define benthic Zone? 
2. Define the term ecological factor? 
3. Name only one intracellular parasite? 
4. What is biome? 
5. Name the type of interaction seen between whale and barnacles growing on its back? 

Two mark question: 

1. Distinguish between the following : ectoparasites and endoparasites? 
2. What are the main functions of water vapours present in the atmosphere? 
3. Explain the response of all communities to environment over time? 
4. Define Allen's rule? 
5. Explain brood parasitism with help of an example? 

Three mark question: 

1.Describe thermal stratification in a lake? 
2. Explain population growth curve? 
3. List any three ways of measuring population density of a habitat? 
4. Differentiate between natality and morality? 
5. Describe various type of age pyramids? 

Five mark question: 

1. Describe environment factors and their importance to plants and animals? 
2. What is ecology? Briefly explain four major abiotic factors of the environment? 
3. Describe the various population characteristics? 
4. What are the different types of adaptations found in animals ? Explain with suitable examples? 
5. Draw and explain a logistic curve for a population of density (N) at a time (t) whose intrinsic rate of natural increase is (r) and carrying capacity (k) ?