==> 2020 WAEC BIOLOGY PRACTICAL ANSWERS

TAKE NOTE: ✔️✔️✔️

NUMBER 1 2 AND 4 IS FOR CANDIDATE IN NIGERIA

WHILE NUMBER 3 IS FOR CANDIDATE IN GHANA ONLY

DONE FOR TODAY

GOOD LUCK
🙌🙌🙌🙌🙌🙌🙌🙌🙌

(1ai)

TABULATE

INFERENCE: It indicates specimen B contains no starch content

(1aii)
TABULATE

(1b)
(i) Test for starch
(ii) Test for protein (Biurets test)

(1c)

(1di)
Fungi

(1dii)

(1diii)

(1ei)
Mullosca

(1eii)

(1fi)

(1fii)

Saprophytic mode of nutrition

(2a)
E – Berry
F – Berry
H – Dry Dehiscent Fruits

(2b)
E – Parietal placentation
F – Axile placentation

(2c)
E – Animals
F – Animals
H – Self dispersal

(2di)
Birds, squirrels, and other small mammals consumes the fruit which will lead to dispersal of the seeds in faeces or as they carry them from the tree to their habitats

(2dii)
(i) Vitamin such as vitamin C
(ii) Mineral such as Potassium, magnesium, iron

(2ei)
Green

(2eii)
It signifies that the pod is young and immature

(2fi)
Marginal placentation

(2fii)

DRAWING

(4ai)
TABULATE:
-TEST: 2 drops of specimen P in a Beaker of water, allowed to stand
-OBSERVATION TIME (seconds): A trail of it’s purplr colour goes to the bottom and difuses in 605secs
-MEDUIM OF SPREAD: Liquid (slow difusion)
-SENSE ORGAN: EYES

(4aii)
-TEST: A levelled spoonful of specimen Q in a beaker of water, stir
-OBSERVATION TIME (seconds):197 seconds
-MEDUIM OF SPREAD: Liquid (moderate difussion)
-SENSE ORGAN: EYES

(4aiii)
-TEST: Specime R cut open and notice the time odour was smelt
-OBSERVATION TIME (seconds): 2 Seconds
-MEDUIM OF SPREAD: Air (fast difussion)
-SENSE ORGAN: Nose

(4b)
Diffusion of gases

(4ci)
(i) Stirring
(ii) Heating

(4cii)
(i) Shaking
(ii) Stirring

(4ciii)
(i) Size of medium
(ii) Wind

(4d)
PLACE YOUR THUMPRINT IN UR PAPER PLS

(4dii)
PLS NAME YOUR PATERN OF UR FINGERPRINT(SEE THE TYPES BELOW)

(4diii)
[Choose ANy THREE]
(i) Loop
(ii) Arch
(iii) Compound
(iv) Whorl

(4div)
(i) It is used in crime detection
(ii) It used as mark of identity
(iii) It is used to determine paternity of a child

(4dv)
Morpholigical variation



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