NECO GCE 2021 BIOLOGY ALTERNATIVE TO PRACTICAL ANSWERS

Biology Paper I (Alternative to Practical)

2.00pm – 4.00pm

1bi)
a)Cell
b)Tissue

(1bii)
I- Nucleus
II- Bud
III- Shell

(1bii)
I- Nucleus
II- Bud
III- Shell

(1biii)
I- Control all the life activities of the cell
II- For reproduction
III- For protection

(1c)
A – autotrophic
B – Photosynthesis
C – parasitic

(1d)
Tabulate
-Under Organisms-
(i)Amoeba
(ii)Euglena
(iii)Paramecium
(iv)Butterfly

-Under Locomotory organ-
(i)Cyclosis
(ii)Flagellum
(iii)Cilia
(iv)Wing

(1ei)
A – the leaf inside flask A will not show blue black coloration indicating absence of starch formation , because of lack of Co2 inside the flask

B – the leaf inside flask B will show black coloration indicating presence of starch formation

(1eii)
Absorption of carbon (iv) oxide in the flask

(1eiii)
Flask B

(1eiv)
Experiment on Co2 is necessary for photosynthesis
(1fi)
Crab

(1fii)
Crustaceans

(1fiii)
I – eye
II – Claw
III – Walking legs
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2ai)
i)Enarmel
ii)Dentine
iii)Cement
iv)Entry to pulp cavity

2aii)
i)Protection of pulp cavity and dentine
ii)Fixes the tooth to jaw bone
(2bi)
H – eagle
I – duck
J – Domestic fowl

(2ci)
I – Humus
II – Top soil
III- Davation layer
IV – Sub soil
V – Regolith
VI – Bedrock

(2cii)
(a) Composed of humus , leaf litters and organic matters
(b) Mostly tin layers in the soil found above the top soil
(c) has dark soil colouration

(2di)
L – Whorl
M – Coop
N – Arch

(2dii)
Crime detection
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(3ai)
O – Monocotyledonous root
P – Dicotyledonous root

(3aii)
O – the xylem and phloem are arranged in a circular pattern, the xylem is not in star shape.

(3aii)
P – the xylem is star shaped, the phloem are arranged at each corner of xylem.

(3aiii)
O
– maize plant
– rice plant

P
– mucuna plant
– cowpea plant

SIMILARITIES
– both possess xylem
– both possess phloem

BIOLOGY
(3aiv)
I – Endoderm
II – pericycle
III – Phloem
IV – Piliferous layers
V – Xylem
VI – Cortex

(3v)
I – Protection of the inner cell
II – Support the root
III – Conditions of manufactured foods
IV – Prevent injury infection and less water
V – Conditions of water and dissolved mineral salts

(3bi)

– O
Absence of mambium
Numerous xylem & phleom

– P
Cambium present
For xylem & phloem

(3bii)
(i) Both have root hair
(ii) Booth possess varcular bundles
COPY THE REST FROM THE IMAGE BELOW

COMPLETED!