WAEC GCE 2021 BIOLOGY PRACTICAL

  

(1ai)
I - Standard petal
II - Krel petal
III - Wing petal
IV - Stigma
V - Style
VI - Ovule
VII - Receptacle
VIII - Plumule
IX - Endocarp
X - Epicarp

(1aii)
(i) It aids pollination because of the colour
(ii) It receives pollen grains firm the anther
(iii) It forms the seeds of flowering plant
(iv) It protects the fruits from drying up

(1b)
(i) It possess attractive colour which attracts insects
(ii) The pollen grains are sticky

(1ci)
III --> VII
IX --> VI
I --> V

(1cii)
The fruit is formed after pollination. The pollen grains moves into the ovary and from this ovule is formed. The Ovule the developed to form the fruit

(1di)
Marginal placentation

(1dii)
(i) Pea
(ii) Sunhemp
(iii) Hibiscus

(1e)
Explosive mechanism

(2ai)
C - Millipede
D - Centipede

(2aii)
Pupa

(2aiii)
Imago

(2bi)
= C
(i) Possession of exoskeleton which reduces water loss
(ii) Possession of many legs for locomotion

= D
(i) Possession of poisonous stings to fight against predators
(ii) Possession of pairs of legs for movement

(2bii)
TABULATE

= C
(i) Absence of poisonous stings
(ii) Many legs
(iii)Short antenna

= D
(i)Presence of poisonous stings
(ii)Few legs
(iii)Long antenna

(2bii)
(i) Segmented body
(ii) antenna

(2c)
(i)It aerate Soil
(ii)It decompose soil organic matter

(2d)
C - Terrestrial
D - Terrestrial

(2e)

(i) By introducing fishes like tilapia to prey on them

(ii) By draining water bodies they are found in

(iii) By spraying the surface of water with oil to inhibit brearhing

(3ai)

G - Bird

H - Lizard

(3aii)

I - Tail

II - Wing

III - Beak

IV - Claws

V - Eyes

VI - Digit

VII - Gular fold

VIII - Tail

(3aiii)

I. It propel the birds

II. It is use for sight

III. It detects sensations

(3bi)

(i) Presence of claw

(ii) Presence of tail

(iii) Presence of scales

(iv) Presence of eyes

(3bii)

[Tabulate]

-BIRDS-

(i) Presence of beak

(ii) Presence of wing

(iii) Presence of neck

(iv) Absence of gular fold

(v) Absence of nuchol crest

-LIZARD-

(i) Absence of beak

(ii) Absence of wing

(iii) Absence of neck

(iv) Presence of gular fold

(v) Presence of nuchol crest

(3ci)

G - Aves

H - Reptilia

(3cii)

G - Terrestrial habitat

H - Terrestrial habitat

(3di)

(i) Possession of beak for catching insects and cracking seeds

(ii) Possession of three toes in the front and one toe in the back make perching easy.

(3dii)

(i) Possession of detachable tail for safety to escape from the predator

(ii) Possession of four legs and powerful limb to escape from the predator

Keep calm and be checking back later for your answers