![2023 NECO GCE Biology Practical Answers [28th November]](https://2.bp.blogspot.com/-xLxpwRX1em4/Wl94CFeJRZI/AAAAAAAAATw/G-0VjUcT71Mp59T6MeRUlvZr1nyojVY0gCPcBGAYYCw/s1600/NECO.jpg "2023 NECO GCE Biology Practical Answers [28th November]")
NECO GCE BIOLOGY PRACTICAL ANSWERS 2023:
(1ai)
A - Butterfly
B - Spider
C - Scorpion
D - Grasshopper
E - Tridax fruit
(1aii)
A - Insecta
B - Arachnida
(1aiii)
COMPLETE THE TABLE:
Number of body division:
C - Two
D - Three
Type of mouth part:
C - Chewing
D - Biting and chewing
(1bi)
(i) Possession of exoskeleton
(ii) They have jointed appendages
(iii) They have segmented body
(1bii)
(i)
A - Three distinct body segments – head, thorax, and abdomen.
B - Divided into cephalothorax (combined head and thorax) and abdomen.
(ii)
A - It has six legs.
B - It has eight legs.
(iii)
A - It has two pairs of large, often colorful wings.
B - Absence of wings.
(iv)
A - It has long, slender antennae.
B - Absence of antennae.
(1biii)
A:
(i) It plays a crucial role in the pollination of flowering plants.
(ii) It is aesthetically pleasing and is often a focal point in ecotourism
B:
(PICK ANY TWO)
(i) They can be employed to control unwanted plant species, acting as a form of biological pest control.
(ii)
They cause nutrient cycling by breaking down plants, fertilizing soils
with their excreta and in turn facilitating plant growth.
(iii) They prevent overgrowth of plants and in turn protecting them for overcrowding and death
(1biv)
I - Pappus
II- Fruit stalk
(1bv)
(i) It is covered in a feathery appendage which helps the fruit to disperse by wind
(ii) It is small in nature
(2ai)
F - Tilapia fish
G - Tadpole
(2aii)
Pisces
(2aiii)
I - Operculum
II - Mouth
III - Anus
IV - Anal fin
V - Caudal fin
(2aiv)
I - It is used for respiration
II - It is used locomotion
(2bi)
(PICK ANY TWO)
(i) Possession of gills
(ii) Presence of fins
(iii) Presence of eyes
(iv) Presence operculum
(2bii)
TABULATE:
SPECIMEN F:
(i) It has a streamlined and elongated body shape with shorter tail
(ii) Possession of scales
SPECIMEN G:
(i) It has a distinct larval body shape with elongated tail compared to their body
(ii) Absence of scales
(2ci)
(PICK ANY FOUR)
(i) Possession of eyes for sight
(ii) Possession of streamline body for easy movement
(iii) Possession of mouth for feeding
(iv) Possession of fins for locomotion
(v) Possession of gills for respiration
(vi) Possession of scales for temperature regulation
(2cii)
(i) Protein
(ii) Fats and oil
(2ciii)
Toad
(2civ)
Thyroxine
(2cv)
(PICK ANY ONE)
Possession of eyes for sight
Possession of gills for respiration.
(3ai)
I: Funnel
II: Cotton wool
III: Water
(3aii)
X: (60 - 50)cm³ = 10cm³
Y: (60 - 30)cm³ = 30cm³
Z: (60 - 40)cm³ = 20cm³
(3aiii)
X: (10/60) × 100 = 16.67%
Y: (30/60) × 100 = 50%
Z: (20/60) × 100 = 33.3%
(3bi)
X: Sandy soil
Y: Clay soil
Z: Loamy soil
(3bii)
X:
(i) It is fine
(ii) It is coarse
Y:
(i) Sticky when wet
(ii) Least coarse
Z:
(i) Rich in humus
(ii) Dark in colour
(3biii)
Experiment to determine the water holding capacity of soil samples
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