Completed NECO GCE 2021 BIOLOGY Practical Questions And Answers – Expo

 

(1ai)
A – Toad
B – Tilapia Fish
C – Bird

(1aii)
II – Tympanum
III – Webbed foot
V – Caudal fin
VI – Operculum

(1aiii)
VII – It is used for eating, preening, and killing prey.
VIII – It protects the ears while also cutting down on wind noise.

(1aiv)
A – Amphibia
B – Pisces
C – Aves

(1av)
TABULATE
-A-
(i) They have poisonous gland on their skin
(ii) Respiration takes place through lungs mainly.
(iii) Absence of fins

-B-
(i) No poisonous gland on their skin
(ii) Respiration mainly through gills, except lungfishes
(iii) Presence of fins

(1avi)
Aquatic

(1bi)
I – Bell jar
II – Rubber sheet
III – Potted plant
IV – Water droplets

(1bii)
II – Prevents water evaporating from the soil and stem
III – For transpiration

(1biii)
Serves as control experiment

(1biv)
1. Cooling effect
2. Translocation of mineral salt
3. Adequate growth of plant
4. Enhancement of absorption rate

(1bv)
Experiment to demonstrate transpiration in young potted shoot

(1bvi)
1. Prevent leakage of air in and out of bell jar by inverting it over a glass sheet
2. Properly fit the rubber sheet

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(2ai)
F – A simple leaf
G – A hibiscus flower

(2aii)
II – Leaf
III – Reticulate venation
IV – Leaf stalls
VI – Lamina

(2aiii)
-Stamen-
(i) VIII (Anther)
(ii) IX (Filament)

-Carpel-
(i) VII (Stigma)
(ii) X (Style)
(iii) XII (Ovary)

(2aiv)
F – for photosynthesis
G – for reproduction

(2bi)
H – Skull of a dog

(2bii)
I =12 C=12 P=16 M=10

(2biii)
I – Sagittal crest
II – Carnassials
IV – Incisors
V – Canines

(2biv)
I – It serves as one of the main chewing muscles
II – It is used for cutting, grinding, chewing bones and tendons
IV – It is used for cutting flesh from bones
V – It is used for killing prey and tearing flesh from bones

(2bv)
(i) Hyena
(ii) Lion

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(3ai)
Longitudinal section of a tomato fruit

(3aii)
I – Epidermis
II – Endocarp
III – Seeds
IV – Sepal
V – Peduncle

(3aiii)
Axile

(3aiv)
(i) it is a source of vitamin
(ii) it yieds income to the farmers
(iii) it serves as soup condiments

(3bi)
J – Hind joint
K – Structure of ball and socket joint
L – Gill

(3bii)
I – Ligament
II – Patella
IV – Bone
VII – Gill filament
VIII – Gill racker

(3biii)
I – it holds the bones together
V – it reduces friction
VI

(3biv)
K – Shoulder
L – Head of a fish

(3bv)
(i) possession of gill rackers
(ii) possession of filaments..

• *Completed*!!!!

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