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Waec GCE/PRIVATE Waec biology Answers

Thursday, 25th February 2021

Biology 2 (Essay)

Biology 1 (Objective)

9:30am – 11:10am

11:10am – 12:00pm

Biology 3 (Alternative to Practical Work)

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WAEC GCE BIOLOGY

(3ai)Variation Is The differences in characteristics between individuals of the same species.

(3aii)
(i)Crime Detection
ii)Blood transfusion
(iii)determination of patenity
(iv)in medicine
(v)in agriculture
(vi)classification of human race.

(3b)
(i) Growth and Development
(ii) Weight Control
(iii) Supplies Energy
(iv) Builds Immunity

1bii…

CONTINUOUS VARIATION… Because the variation is change gradually within a population…

BIOLOGY OBJ Questions and Answer

BIOLOGY PRACTICAL ANSWERS


Biology 2 (Essay)

Biology 1 (Objective)

9:30am – 11:10am

11:10am – 12:00pm

Biology 3 (Alternative to Practical Work)

2:00pm – 4:00pm

(2a)
Rough or smooth and colour

(2bi)
(a) Coloured seed – coloured and smooth
(b) Coloured seed – coloured and rough
(c) Coloureles seed – coloured and rough
(d) Rough seed – Colourless and rough
(e) Smooth see – Colourless and Smooth

(2bii)
(a) Coloured seed and smooth – 4
(b) Coloured and smooth – 12
(c) Colourless and rough – 33
(d) Colourless and and rough – 11

(2biii)
4:12:33:11

(2c)
Colourless and Smooth

(2cii)
Rough and coloured

(2di)

  • Mendelian first law of segregation
  • Mendelian second law of independent assortment

(2dii)
The second law states that each characters units and is inherited independently of any other character

BIOLOGY PRACTICAL

(3ai)
I – nail
II – hind toe
III –
IV – claws

(3aii)
J- possession of curved beak for picking food.
K- possession of feather to control temperature.
L- possession of webbed feet for swimming in water.

(3iii)
J- eagle
K- fowl
L- Owl

(3bi)

  • To test present of strach in a leaf

(3bii)
II , III, IV, I

(3biii)
I – place the leaf in a white liter and pour few drop of iodine solution on the leaf

II – Boil the leaf in water for 4-6 minutes so as to kill the cell enzymes and burst starch grains present

III – Drop the leaf into a test tube containing 70% alcohol to decolorize the leaf

IV – The decolonized leaf is dropped into a breaker containing that water to soften it

(3biv)
(i) the leaf must not boil more than 4-6 minutes

(3bv)

  • if the leaf boils more than 4-6 minutes , the leaf will not turn blue black ,whiten iodine added

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