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Neco 2021 biology practical/ Free Neco midnight answer/ correct Neco 2021 Neco expo free

Practical Biology ANSWERS

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==========================

(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

====================================

(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

================================

(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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Posted by on July 22, 2021.

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Categories: 2021 Neco exam runs

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