2018/2019 WAEC GCE RUNZ: BIOLOGY OBJ AND THEORY ANSWERS – NOV/DEC EXPO
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BIOLOGY OBJ AND THEORY ANSWERS FROM EXAMHOT.COM
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BIOLOGY OBJ:
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1-10: CBABDBBBBC
11-20: BBCDBACBDC
21-30: DBCCCCBAAA
31-40: BBBDDBDADC
41-50: CDCCCBBCDA
BIOLOGY THEORY:
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(2a)
Vitamins are group of organic compounds which are essential for normal growth and nutrition and are required in small quantities in the diet because they cannot be synthesized by the body.
(2b)
Vitamin: C
One Function: Healing of wounds
One Deficiency: Scurvy
One Source: Citrus Fruits
Vitamin: D
One Function: Strong bones and teeth
One Deficiency: Rickets
One Source: Eggs
Vitamin: B
One Function: Releases energy from carbohydraes
One Deficiency: Beri-beri
One Source: Yeast
Vitamin: K
One Function: Clotting of blood
One Deficiency: Failure of blood to clot
One Source: Milk
(2c)
(i) Iron: Assists in nitrate and sulfate reduction and energy production within the plant
(ii) Nitrogen: For rapid growth
(iii) Calcium: It is responsible for holding together the cell walls of plants
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(3ai)
Mango trees -> Caterpillars -> chicks of domestic fowls -> Hawks
(3aii) Draw the diagram
(3bi) Water:
-Serves as a habitat for organisms.
-Serves as a source of water for irrigation.
-Serves as a source of hydroelectric power.
(ii) Soil:
-It ensures continuous sources of plant nutrients.
-It ensures sources of water/reservoir for soil organisms.
-It ensures sources of raw materials for some industries.
(iii) Forest:
-It ensures the conservation of trees or forest product.
-It helps to check erosion.
-It helps in the preservation of natural spaces.
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(6a)
(i) Rokert hoot
(ii) Felix Diyardin
(iii) Mathias Schleidon.
(iv) Theodor Schwom
(6b)
In a tabular form:
Classes of plants based on life cycle and Two examples
Classes | Examples
(i) Anual | Vegetable, Cotton
(ii) Biennials | Carrot, Ginger
(iii) Perennials | Cocoa/banana
(6c)
The amniotic fluid help to neutralize the effect of changes of external temperature
(6d)
(i) Rhizobium : It helps to fix atmospheric nitrogen directly into the plant.
(ii) Azotobacter: It can fix atmospheric nitrogen into the soil either aerobically or anaerobically.
(iii) Blue-green algae: They are mainly auto trophic plants; they can synthesize their own food.
(6e)
Draw the diagram
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2018/2019 WAEC GCE RUNZ: BIOLOGY OBJ AND THEORY ANSWERS – NOV/DEC EXPO
2018/2019 WAEC GCE RUNZ: BIOLOGY OBJ AND THEORY ANSWERS – NOV/DEC EXPO
2018/2019 WAEC GCE RUNZ: BIOLOGY OBJ AND THEORY ANSWERS – NOV/DEC EXPO
2018/2019 WAEC GCE RUNZ: BIOLOGY OBJ AND THEORY ANSWERS – NOV/DEC EXPO
2018/2019 WAEC GCE RUNZ: BIOLOGY OBJ AND THEORY ANSWERS – NOV/DEC EXPO
2018/2019 WAEC GCE RUNZ: BIOLOGY OBJ AND THEORY ANSWERS – NOV/DEC EXPO
