2023 NECO Biology Practical Answers [11th July]
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NECO JUNE/JULY 2023 FREE BIOLOGY PRACTICAL SPECIMEN QUESTIONS AND ANSWER ROOM.

Tuesday 11th July 2023
Biology (Practical)
10:00am – 12:00noon


2023 NECO BIOLOGY PRACTICAL QUESTIONS & ANSWERS [11TH JULY, 2023]

(1a)
Specimen A: Land snail
Specimen B: Toad
Specimen C: Spider
Specimen D: Crayfish

(1aii)
(PICK ANY TWO)
(i) Shells are used for decoration
(i) Shells are used as source of calcium for animal feeds.
(ii) It also serve as a source of animal protein for man.
(iii) It causes damages to crop

(1aiii)
TABULATE

SPECIMEN A:
(PICK ANY TWO TO TALLY WITH SPECIMEN B)
(i) Have a pair of retractable tentacles on their head.
(ii) Presence of shell
(iii) They have a soft and slimy body

SPECIMEN B:
(PICK ANY TWO TO TALLY WITH SPECIMEN A)
(i) Absence of tentacles
(i) Absence of shell shell,
(iii) Thick skin covered in warts or bumps.

(1aiv)
(PICK ANY TWO)
(i) It aids in accurate species identification and understanding of their ecological roles.
(ii) It is rucial for conservation efforts and monitoring populations
(ii) It contributes to ecological research and ecosystem management

(1av)
(i) Webbed Feet
(ii) Large Muscular Thighs

(1bi)
(i) Specimen B: Amphibia
(ii) Specimen C: Arachnida
(iii) Specimen D: Malacostraca

(1bii)
(PICK ANY TWO)
(i) Two body segments
(ii) Eight legs
(iii) Multiple pairs of eyes

(1biii)

(1biv)
(PICK ANY THREE)
(i) Hard exoskeleton for protection against predators and physical damage
(ii) Gills for respiration inside water
(iii) Claws for defense, capturing prey, and manipulating objects in their environment
(iv) Antennae for sensory perception
(v) Camouflage and protective coloration which allows them to hide from predators or prey

(2ai)
Specimen E: Spirogyra filaments
Specimen F: Mucor
Specimen G: A week old groundnut seedling
Specimen H: A week old maize seedling
Specimen I: Microscope

(2aii)
E: Aquatic habitat
F: Damp and decaying organic matter

(2aiii)
E: Autotroph
F: Saprophytes

(2aiv)
They produce their own food through photosynthesis.

(2bi)
Specimen E:
(PICK ANY THREE)
(i) Green coloration.
(ii) Long and filamentous structure.
(iii) Transparent cellulose cell wall
(iv) Spiral-shaped green chloroplasts

Specimen F:
(i) Presence of spores.
(ii) Thread-like structure.
(iii) Elongated spore-containing structure.

(2bii)
Colour: Green
Role: For capturing sunlight for photosynthesis and energy production

(2ci)
(i) Class of G: Angiospermae.
(ii) Class of H: Angiospermae

(2cii)
(i) Specimen G: Epigeal Germination
(ii) Specimen H: Hypogeal Germination

(2ciii)
(i) Specimen G: Reticulate venation
(ii) Specimen H: Parallel Venation

(3ai)
Specimen K: Pigeon
Specimen L: Agama Lizard
Specimen M: Rat
Specimen N: Tilapia

(3aii)
(PICK ANY FOUR)
(i) It has small, round ear openings located on the sides of its head.
(ii) It has  a triangular-shaped head.
(iii) It has a prominent crest on its head and neck.
(iv) The head and neck are covered in scales.
(v) It has movable eyelids that can close.
(vi) It has nasal openings on the upper part of its snout.
(vii) The color of its head and neck is orange.

(3bi)
TABULAR FORM

SPECIMEN K:
(PICK ANY FIVE)
(i) Possession of sleek and aerodynamic body shape that reduces air resistance for efficient flight.
(ii) Possession of strong pectoral muscles that enable rapid and sustained wing beat for flight.
(iii) Possession of lightweight and hollow bones that reduce their overall body weight for easy flight.
(v) Possession of exceptional eyes for navigation and food sourcing while in flight.
(vi) Possession of specialized feathers that provide control and stability during flight.

(3bii)
(PICK ANY TWO)
K: Compact and rounded body shape
L: Slender and elongated body shape.

K: it has a Short tail with fan-shaped feathers.
L: it has a Long, tapering tail.

K: It has a rounded head
L: Triangular-shaped head

K: It has a feathered body
L: It has Scaly skin

K: short neck
L: slender, flexible neck

K: modified limbs as wings.
L: well-defined limbs with sharp claws

(3ci)
(PICK ANY TWO)
(i) Beak and Jaw Structure
(ii) Eye Structure
(iii) Coloration and Camouflage

(3cii)


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