2016 WAEC Biology Theory (a) (i) Explain the term agglutination as used in blood transfusion. (ii) The table below...

WAEC 2016

(a) (i) Explain the term agglutination as used in blood transfusion.
(ii) The table below represents blood transfusion between blood donors and recipients.

Donor		Recipient
		A	B	AB	O
	A
	B
	AB
	O	+

(b) Explain how each of the following organisms are adapted for obtaining food.
(i) Mosquito larva
(ii) Dodder plant
(iii) Grasshopper

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Explanation

(a)(i) Agglutination;
The clumping together; of antigens or red blood cells/RBC; with the corresponding antibodies in the plasma; of incompatible blood groups/wrong blood group.
(ii)

Donor		Recipient
		A	B	AB	O
	A
	B
	AB
	O

(b) How each of the following organisms are adapted for obtaining food

(i) Mosquito larva - Possess a pair of ciliated mouth brushes; for creating water current to carry water with food particle into the mouth; - Its mouth brushes; filter food out of water and sweep it into the mouth.

(ii) Dodder plant - Possess haustoria; for penetrating host plant tissue to obtain food/water

(iii) Grasshopper

Possess mandibles/heavy toothed jaw-like structures; for cutting/crushing food/plant materials/vegetation
Possess maxillae; for directing food to mandibles/cutting/grinding food
Labrun; for holding food/ plant materials/vegetation
Labium; for guiding foods/prevent it from falling off.

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