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NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
MARCH/APRIL 2016 EXAMINATION

COURSE CODE:           BIO 313

COURSE TITLE:            ANIMAL ECOLOGY

TIME ALLOWED:         2 Hours

INSTRUCTION: Answer question 1 and any other three questions

1a        Explain the historical background of animal ecology                                                                    10 marks

b          Differentiate between the following pairs of terms:

            i.          Composition and diversity                                                                                       2 marks

            ii          Habitat and ecological niche                                                                                                2 marks

            iii         Fundamental niche and realized niche      

            iv         competition and predation                                                                                      2 marks

            v          State life table and population growth rate                                                                      2 marks

c          Define competition in relation to animal species                                                              2 marks

d          What is the limitation of the k-value concept why is it difficult to estimate k-value in natural populations?   3 marks

 

2.         Write briefly on the different types of composition by:

            i. Mechanism                                                                                                                          6 marks

            ii. Species                                                                                                                                9 marks

 

3a        What is animal population control? Discuss briefly the main biotic factors that may limit animal population growth?     6 marks

b          Using appropriate graphs, explain how competition can lead to:

            i. Extinction

            ii. Resource partitioning                                                                                                       9 marks

 

4a        With a clearly labelled schematic diagram, discuss an ocean detritus food web                       10marks

b          Explain the predator-prey population curve presented in figure 1 below:                                5 marks

 

5.         Discuss four methods of transfer of information from one animal to another                     15 marks

 

6a        What is age distribution of population?                                                                                 3 marks

b          Using schematic diagram, differentiate among the three kinds of population defined by age distribution.                                                                                                                                    6 marks

c          Summarize the main types of symbiotic relationships in a table listing the types of relationship and expected outcomes.                                                                                                                6 marks

 

 


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