WAEC GCE Biology Practical Solution Expo Answer – Nov/Dec Expo

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BIOLOGY PRACTICAL SOLUTION

2a)

A- symbiotic relationship

B- predation

C- symbiotic relationship

D-epiphytsm

E-parasitism

2b)

Tabulate

Beneficial

A,C,D

harmful

B,E

1ai)Pectoral Girdle(Scapula

1aii)I-Scapula

II-Spine of scapula

III-Covacord process

IV-Acronium Process

V-Gleniod cavity

VI-Metacronium process

1bi) Humerus

1bii)Ball and socket joint

1c)

-It holds the upper limbs to the axial skeleton

-Attachment of muscles.

1d)

I. Sunlight

II. Oxygen

III. Bubbles of gas

IV. test tube

V.funnel

VI .water

VII.Beaker

VIII.Elodea

1e)

i)To show that oxygen is given off During photosynthesis.

ii)

-Sunlight

-carbon (iv)oxide

1f)

i.water

iiElodea

iii. Photosynthesis

iv. The oxygen can be tested by bringing a glowing splincter close to it,which will be rekindled.

4a)

I)Operculum

II)Hind limb

III)Tympanum

IV)Trunk

V)eye

VI)lateral line

VII)dorsal fin

VIII)caudal fin

4bi)

Tabulate

Vertebra

i)they are poikilothermic or cold-blooded animal

ii)they have fins which are used for movement in water

iii)they have naked or moist and glandular skin with no external scales

iv)they do not show parental care

v)they have a two chambered heart

Vertebrate B

i)they are aquatic animal

ii)they have gills which used for gaseous exchange

iii)the skin is covered by scales but few are with out scale

iv)they show parental care for young onces

v)they have three chambered heart

4bii)

i)they both posses scale

ii)they both posses eyes

iii)they both posses respiratory organs

4ci)

A-amphibian

B-pisces

4cii)

i)they posses fins which are used for movement

ii)they posses swim bladder which posses swim bladder which enables them to maintain buoyancy in water

iii)they posses lateral line system for detectin of vibration

4di)

i)they posses pigment on their skin which act as a camourplage against it predators

ii)they posses scales on the skin which reduce water loss from the body against its predators

iii)they posses digits or claws use for self defence

4dii)

i)water

ii)land

4diii)

i)they are use as food

ii)they are use for the preparation of local medication

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