(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.