2024 NECO BIOLOGY: 2024 NECO BIOLOGY PRACTICAL ANSWERS (4431)

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(1ai)
Specimen; A is yam tuber
Specimen; B is cassava tuber
Specimen; C is quadrant
Specimen; D is insect net
Specimen; E is rain guage
Specimen; F is rice grain
Specimen; G is dry groundnuts seed

(1aii)
Specimen; A is propagated from small tubers
Specimen; B is propagated by stem
Specimen; F is propagated by seeds

(1aiii)
Specimen; C is used for for study of the distribution of an item over a large area.
Specimen; D is used for prevention against insects
Specimen; E is used to measure the precipitating rain

(1bi)
(i)The surface of B turn blue-black
(ii)starch is present

(1bii)
Specimen; F grains (cereals)
Specimen; G puises (legume)

(1biii)
(i)The paper appears translucent
(ii) Specimen; G contain fat and oil or fat and oil is present in specimen G

(1biv)
Protein

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(2ai)
H - Contour feather
I - Quill feather
J - Filoplume
K - Millipede
L - Centipede

(2aii)
(i) They protect birds from the cold
(ii) They are used for flight
(iii) They provide insulation to birds
(iv) They serve as waterproof to birds

(2aiii)
(i) Wings
(ii) Tail

(2bi)
Diagram of specimen I.



(2bii)
(i) H - It aids in thermoregulation
(ii) J - It helps birds in detecting changes in feather position caused by body movement or wind

(2biii)
K - Diplopoda
L - Chilopoda.

(2biv)
In tabular form
Specimen K:
(i) They are more rounded.
(ii) They have two sets of legs per segment positioned directly under their body.

Specimen L:
(i) They have a flatter body
(ii) They have one set of legs per segment positioned on the side of their body.

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(3ai)
M - Grasshopper
N - spider
O - Larva of a house fly
P - Larva of a mosquito
Q - Flamboyant flower
R - Hibiscus flower

(3aii)
(i) M - Insecta
(ii) N - Arachnida

(3aiii)
(i) Specimen N has four pairs of legs.
(ii) It has two additional pairs of appendages.
(iii) Specimen N does not have antennae or wings.

(3aiv)
O - Decaying matter
P - stagnant water

(3bi)
(i) Anthers
(ii) Filaments

(3bii)
Diagram of specimen Q.

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