Biology JAMB, WAEC, NECO AND NABTEB Official Past Questions

                                                  PART I

ANSWER ALL THE QUESTIONS

1 (a)Specimens a A, B and C are different liquids of food materials. Cary out the Following tests to identify the food Contents Of Specimens A, B and C.

Wash the test-tubes after each use to avoid contaminating the next sample.

Record your tests and observations shown in the table below

(i) To a small portion of a specimen A, add four drops of reagents F, Shake the mixture and heat gently for a few minutes. Record your observations and inference. 

(ii) To a small portion of a specimen A, add three drops of reagent D, shake the mixture and heat gently for a few minutes. Allow the mixture to cool. Record your observations and inference.

(ii) To a small portion of a specimen A, add three drops of reagent H, shake the mixture and heat gently for a few minutes. Allow the mixture to cool. Record your observations and inference.Leave this mixture in the test tube.

(iv) To the resulting mixture in (ii) above, add three drops of reagent E, shake the mixture and heat gently for a few minutes. Allow the mixture to cool. Record your observations and inference.

(v) To a small portion of specimen B, add three drops of reagents G, Shake the mixture. Record your observations and inference.  

(vi) Take a strip of the litmus paper provided, dip the tip of the  paper into Specimen C, Record your observations and inference of the reaction on the litmus paper.

 (b)(i) Give one example each of the food contents identified  in specimens A and B (ii) State two uses each, of the food contents identified in specimens A, B and C to man. 

(c) Name the primary source of the food contents identified in specimens A and B and a natural source of specimen C.

2. (a) (i) State three observable I and J without reasons.(ii) Name the habitats of specimens I and J (b) State three observable structural adaptations for movement possessed by specimen J (c)(i) Name one respiratory organs of specimen l and J three respiratory organs of specimen J. (ii) State four common features of the respiratory organs of specimens I and J(d) Cut off one of the opercula of specimens I with the scalpel or small knife to expose the respiratory organ. Make a labeled drawing about 8 cm to 10cm long of the head region up to the end of the pectoral fin only to show its structures.

                                                                                                      PART II

ANSWER ALL THE QUESTIONS

3. (a) Observing specimen K, copy and complete the table below

b. Cut Specimen K longitudinally into iwo halves. Observe the halved specimen K and use it to answer Questions (b) (i) – (iv) . (i) What is the symmetry of specimen K (ii) Classify Specimen K in relation to its reproductive structures.  structures. (iii) Name tne type of placentation specimen K (iv) What type of ovary does specimen K have?

c. Detach the sepals and petals of the longitudinal section of the Specimen and make a labeled diagram of 10cm to 12cm long to illustrate the features of the remaining part of specimen k

d. Name the agent of pollination of specimen K . (ii) Give one example of the agent of pollination of specimen K  (iii) State four adaptive features of specimen K that attracts the agent you have mentioned.

(a) (i) Name four similarities found in plant and animal cells
(ii) In a tabular form list four different cells found in man and give a function for each of the cells.

(b) (i) Name the two types of cell divisions.
(ii) Give two examples each of life processes involved in each type of the cell division.

(c) Name the two types of reproduction usually associated with organisms. 
 

(a) (i) Define the term metamorphosis.
(ii) Name the two types of metamorphosis that organisms undergo and mention two organisms that undergo each type.

(b) (i) State four economic importance of insects and name an example of each of the insects involved.
(ii) List four peculiar features of social insects. 
 

(a) (i) What is Pollution?
(ii) Name two pollutants each of air and water.

(b) (i) State four effects of water pollution.
(ii)Mention four ways of preventing water pollution in an environment.

(c) (i) Name three sources of noise pollution.
(ii) State three effects of noise pollution on man.
 

(a) (i) Define the law of independent assortment.
(ii) State the findings from Mendel’s experiment involving white-flowered and red-flowered pea plants.
(iii) Illustrate these findings by means of simple diagrams.

(b) Explain why blood groups A and B in man can exist both in heterozygous and homozygous conditions while blood group 0 can only exist in homozygous state. . 
 

(a) (i) Define the term hydrosphere.
(ii) Give three examples of hydrosphere.

(b) (i) State the two laws of thermodynamics levels.

(c) (i) Name two local biotic communities in Nigeria and associate each type with a particular State in Nigeria.
(ii) List three factors that affect organisms in the marine habitat.
(iii) State three adaptive features of sea weeds. 
 

State the principles involved in the following methods of food preservation:
(a) (i) Salting (ii) Refrigeration (iii) Drying (iv) Smoking (v) Chemicals.

(b) State four problems that may be caused by human overpopulation.

(c) Explain three ways by which the Government may increase food production. 
 

Which of the following habitats cannot be used for the study of succession?

According to Charles Darwin’s Theory of Evolution, natural selection involves the survival of the

In fishes, the brooders return to their parents mouth for

Which of the following traits may not be important in marriage counselling

Which of the following scientists was involved with organic evolution?

The genotypic ratio of 1 : 2 : 1 in the offspring of a hybrid cross illustrates the law of

Which of the following statements about sex determination is correct? At fertility

Which of the following statements is correct about variation?

Which of the following is an example of discontinuous variation?

The major types of man’s finger prints do not include

Which of the following resources is competed for by organisms in the desert?

Which of the following is a renewable natural resources?

Which of the following is an effect of carbon monoxide on man?

During prolonged exercises, glucose in the muscle is convened to