NECO 2021 Biology Practical Answer – June/July Expo

NECO Biology Practical Answer

NECO Biology Practical Questions Answers 2021 and Update.
(1ai)
A- Atlas Vertebra
B- Thoracic Vertebra
C- Scapula
D- Lumbar Vertebra

(1aii)
A- Neck Region.
B- Chest Region.
C- Shoulder Region.
D- Upper Abdomen.

(1aiii)
Tabulate
Under Specimen A
(i) It has short neural Spine.
(ii) Vertebrabateria Canal is Present.

Under Specimen D
(i) It has board and neural Spine.
(ii) Vertebrabateria Canal is Present.

(1aiv)
(i) They both have neural canal.
(ii) They both possess centrum.

(1b)
Diagram of specimen C

(1ci)
E – pooter
F – sweep net
G – tridax fruit
H – tadpole

(1cii)
E ; it is used for collecting insects

F ; it is used for collecting flying insects and other invertebrates from long grass

(1ciii)
(i)By wind

(1civ)
(i) presence of gills from respiration
(ii) presence of long muscular tail for swimming and movement in water
(iii) presence of transparent fin for swimming
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(2ai)
I – Spirogyra
J – Okro fruit
K – mango fruit
L – Tick
M – Bean weevil

(2aii)
(i)their bodies are characterised by multicellular filaments
(ii)it is an unbranched, filamentous green algae occuring in stagnant water

(2bi)
Tabulate
-Under specimen J-
(i)seed are small
(ii)many seeded
(iii)anile placentation

-Under specimen K-
(i)seed in large
(ii)one seeded
(iii)Basal placentation

(2bii)
L – class arachnid
M – class insect

(2biii)
L; cause stress in animals affected by bites, blood losses that can lead to anemia and even death

M; they make holes in the plants to oviposition the causing directed and indirect damage

(2ci)
Diagram of specimen K

(2cii)
Tabulate
-Under specimen L-
(i)pear shaped body
(ii)approximately 3 to 5 mm in length to age, species

-Under specimen M-
(i)general compact and oral in shape
(ii)size range from 1 to 22mm
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(3ai)
N – cactus plant
O – water lettuce
P – soldier termite

(3aii)
N – Terrestrial habitat/forest
O – Aquatic habitat
P – Terrestrial habitat

(3bi)
Adaptive features of N (cactus)
(i)presence of spines to reduce water loss
(ii)presence of succulent stems to conserve water.
(iii)present of thick and waxy skin to reduce loss of water

Adoptive features of O (water lettuce)
(i)presence of air space for bouyancy
(ii)presence of numerous root or absorption of mineral salt
(iii)presence of more stomata on upper surface for diffusion of CO²

(3bii)
Diagram of specimen P

(3ci)
(i)it increases humus content of the soil
(ii)it increases penetration of water in the soil by burrowing

(3cii)
(i)defending the colony against enemies
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Completed!..

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