Neco Biology Practical 2021 Answers

Neco Biology Practical 2021 Answers, Free NECO Biology Practical Questions And Answers 2021, neco Biology Practical 2021 Answers, Free questions solutions and result for 2021 Biology practical specimen NECO June/July Biology (Agric) (Practical) Questions and Answers for NECO June/July Candidates Free of Charge | NECO June/July Free Biology Practical Specimen Questions and Answers EXPO Room (22nd July, 2021)

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BIOLOGY PRACTICAL ANSWERS ?

(3ai)
N – Cactus plant
O – Water lettuce
P – Soldier termite

(3aii)
N – Dry or arid land (terrestrial)
O – Freshwater swamp (aquatic)
P – Soil or wood

(3bi)
Adaptive features of N (Cactus):
(i)Thick succulent stems for storing water
(ii)Spikes protect cacti from animals
(iii) Thick, waxy skin to reduce loss of water and to reflect heat.

Adoptive features of O (Water lettuce):
(i)Tiny hairs on the roots and leaves helps it to float
(ii)Waxy leaves, which help water run off easily
(iii)Hairy leaves trap air bubbles, making it survive oxygen-deficient mediums.

(3bii)
DIAGRAM OF SPECIMEN P:

(3ci)
(i)Good source of animal protein as food
(ii)Termites drive earthworms from soil that enhance soil fertility

(3cii)
(i)Soldier termites defend the nest from enemies and also protect the workers during food gatherings.

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(2ai)
I – Spirogyra
J – Okro fruit
K – Mango fruit
L – Tick
M – Bean weevil

(2aii)
(i)Cup-shaped chloroplast
(ii)Green, with cylindrical cell

(2bi)
TABULATE

SPECIMEN J:
(i)Dry dehiscent fruit
(ii)Many-seeded
(iii0dispersal by explosion

SPECIMEN K:
(i)Succulent fruit
(ii)One-seeded
(iii)Dispersal by animal

(2bii)
L – Arachnida
M – Insecta

(2biii)
L – Bloodsucking of ticks causes skin irritation

M – Feed on seeds thereby reducing the quality and value of the beans.

(2ci)
DIAGRAM OF SPECIMEN K

(2cii)
TABULATE

SPECIMEN L:
(i)Have no wings to fly
(ii)Has no snout

SPECIMEN M:
(i)Have wings for flying
(ii)Has an elongated snout

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(1ai)
A – Atlas vertebra
B – Thoracic vertebra
C – Scapula
D – Lumber Vertebra

(1aii)
A – Neck
B – Thorax
C – Pectoral girdle
D – Abdomen

(1aiii)
TABULATE

SPECIMEN A:
(i)Reduced neural spine
(ii)Centrum absent

SPECIMEN D:
(i)Neural spine broad and massive
(ii)Centrum present and well developed

(1aiv)
(i)Both B and D have no vertebrarterial canal
(ii)Both have prominent neural spines

(1b)
DIAGRAM OF SPECIM C:

(1ci)
E – Pooter
F – Sweep net
G – Tridax fruit
H – Tadpole

(1cii)
E – used for sucking in of tiny invertebrates such as insects from leaves.

F – Used for capturing flying insects such as butterflies.

(1ciii)
G is dispersed by wind.

(1iv)
(i)Sticky secretion for clinging to submerged vegetation.
(ii)Skin and external gills for respiration
(iii)Tail for swimming.