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2021/2022 NECO GCE Biology Practical Questions: Biology Practical NECO GCE Expo Questions is out now on our website. In this article, I will be showing you the recent NECO GCE Biology Practical questions with answers.
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NECO GCE Biology Practical Answers Latest Update
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Friday 26th November, 2021
- Biology Paper I (Alternative to Practical) 3.30 pm – 5.30 pm
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Conclusion on NECO GCE Biology Practical 2021 Question
Today’s NECO GCE Biology Practical Answers:
N – Cactus plant
O – Water lettuce
P – Soldier termite
N – Dry or arid land (terrestrial)
O – Freshwater swamp (aquatic)
P – Soil or wood
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.
DIAGRAM OF SPECIMEN P:
(i)Good source of animal protein as food
(ii)Termites drive earthworms from soil that enhance soil fertility
(i)Soldier termites defend the nest from enemies and also protect the workers during food gatherings.
I – Spirogyra
J – Okro fruit
K – Mango fruit
L – Tick
M – Bean weevil
(ii)Green, with cylindrical cell
(i)Dry dehiscent fruit
(iii0dispersal by explosion
(iii)Dispersal by animal
L – Arachnida
M – Insecta
L – Bloodsucking of ticks causes skin irritation
M – Feed on seeds thereby reducing the quality and value of the beans.
DIAGRAM OF SPECIMEN K
(i)Have no wings to fly
(ii)Has no snout
(i)Have wings for flying
(ii)Has an elongated snout
A – Atlas vertebra
B – Thoracic vertebra
C – Scapula
D – Lumber Vertebra
A – Neck
B – Thorax
C – Pectoral girdle
D – Abdomen
(i)Reduced neural spine
(i)Neural spine broad and massive
(ii)Centrum present and well developed
(i)Both B and D have no vertebrarterial canal
(ii)Both have prominent neural spines
DIAGRAM OF SPECIM C:
E – Pooter
F – Sweep net
G – Tridax fruit
H – Tadpole
E – used for sucking in of tiny invertebrates such as insects from leaves.
F – Used for capturing flying insects such as butterflies.
G is dispersed by wind.
(i)Sticky secretion for clinging to submerged vegetation.
(ii)Skin and external gills for respiration
(iii)Tail for swimming.
NECO GCE Bio Practical Practice Questions
The questions below are for practice not the 2021 Biology Practical questions.
- (a) (i) Phylum of specimens C/Butterfly and E/Grasshopper: Arthropoda
(ii) Reasons for the answer in 1 (a)(i): (I) Metameric segmentation/segmented bodies: (II) Jointed appendages; (III) presence of chitinous exoskeleton/exoskeleton made of chitin; (IV) Bilateral symmetry.
(b) differences between
|Wings present||Wings are absent|
|Proboscis present||Mandibles are present|
|Proleg absent||Mandibles are present|
|Legs are longer||Legs are shorter|
|Claspers are absent||Claspers are present|
|Has one pair of compound eyes||Has simple eyes|
|Has antennae||Absence of antennae|
|Osmeterium absent||Osmeterium present|
|Presence of proboscis||Presence of mandibles|
|Clubbed/rounded/knobbed antennae||Not clubbed/rounded/knobbed antennae/tapering antennae;|
|Wing is membreneous/soft||Harder/less membraneous wings/forewings are leathery|
|Surface of wing is powdery/have scales/eye spots||Surface of wing is not powdery/absence of scales/eye spots;|
|Hind limbs/legs smaller/shorter/less muscular||Hind limbs/legs/larger and elongated/more muscular|
|Abdomen is hairy||Abdomen is not hairy/smooth|
(c) Relationship between specimens C/Butterfly and D/Caterpillar:
(i) C/butterfly is the adult/image of D/Caterpillar
(ii) D/Caterpillar is the larva/larva stage of C/Butterfly
(d) (i) Habitat of specimen D/Caterpillar: Garden/Citrus leaves/vegetables/leaves/fruits/green plant has three pairs of true legs with claws for locomotion. (III) it has claspers; for attachment to vegetation/twid; (IV) presence of four pairs of prologs/false legs: for climbing; (V) its coloured pattern; enables it to blend with its environment/camouflages/escape predators; (VI) it has spiracles; for gaseous exchange, (VII) it has simple eyes for vision (VIII) has osmeterium; as defense mechanism/which emits foul smell to scare away predators.
(e) Diagram/drawing of dorsal view of specimen C/Butterfly
2(a)observable features of biological importance in
Specimen F/Carrot: (i) Main root/tap root/swollen/root tuber; (ii) Presence of lateral roots; (iii) Presence of short stem (green) ; (iv) Presence of foliage leaves; (v) Part of main root tapering
Specimen G/Irish potato: (i) Swollen stem/stem tuber; (ii) Bud(s)/ eye; (iii) Lenticels; (iv) scale leaf; (v) adventitious roots(s)
(b) (i) Classification of (I) Specimen F/Carrot: Root tuber; (II) Specimen G/Irish Potato: Stem tuber. Stem (above the swollen tap root). Specimen G/Irish Potato: Swollen, Stem/tuber; presence of bud(s)/eye; presence of scale leaves/leaf; presence of lentice(s).
(c) Class of specimen H and J: insect
(d) (i) Observable differences between specimen H and J.
|H/Adult mosquito||J/Adult cockroach|
|Smaller in size||Big/large in size|
|A pair of wings||Two pairs of wings;|
|Absence of hard hind wing||Presence of hard hind wing/elytra;|
|Shorter antennae||Longer antennae|
|Absence of maxillary palp/maxilla||Presence of maxillary palp/maxilla|
|Thin legs||Thick/large legs;|
|Absence of spines on legs||Presence of spine on legs.|
(ii) Similarities between specimens H/adult mosquito and J/adult cockroach:
(i) Presence of a pair of compound eyes
(II) Body is divided into three divisions/head, thorax and abdomen
(iii) three pairs of/six(walking) legs
(IV) presence of jointed appendages
(V) presence of a pair of membraneous wings
(VI) Presence of a pair of antenna
(VII) Both have exoskeleton made of chitin
(VIII) Segmented Body.
(i) Feeding Habit of Specimen H/adult mosquito: Piercing and sucking. Specimen J/adult cockroach: Biting and chewing
(ii) Observing features used for feeding in specimen J/adult cockroach: Mandible; maxillae; labrum
4. (a) (i) Phylum of Specimen R/Earthworm: Annelida
(ii) Reasons for the classification of Specimen R/Earthworm:
(I) Presence of metameric segmentation/segments are separated from each other (by septa
(II) They are bilaterally symmetrical
(II) Segments are separated from each other
(IV) Presence of chaetae
(V) Body is covered by thin collagen cuticle
(VI) body is long and cylindrical.
(iii) Habitat of Specimen R/Earthworm:
(I) Under decaying leaves
(II) Wet/moist soil
(III) In open savanna/savannah beneath tall grasses
(IV) In the forests in decaying tree-stumps.
(b) (i) Features of adaption of Specimen R/Earthworm:
(I) Bristle like Caetae/seatea; for locomotion
(II) Mosit skin; for gaseous exchange
(III) Pointed anterior; for burrowing into the soil
(IV) Slimy body; reduces friction during movements
(V) Citellum; for attachment during exchange of sperms/reproduction/secretes cocoon (in which it eggs are deposited).
(ii) Economic importance of Specimen R/Earthworm:
(I) it aerates the soil
(II) it enriches/improves soil fertility
(III) its secretions neutralize the acid soil
(IV) Used as bait for fishing
(V) As food for some birds.
(c) Diagram/Drawing of the dorsal view of Specimen R/Earthworm
(d) Type of fruit: Specimen S/unripe mango fruit – Drupe, Specimen T/tomato fruit – Berry.
(e) (i) Observable differences between Specimens S and T
|Specimen C/Unripe Mango Fruit||Specimen T/tomato Fruit|
|Green in colour||Red/Yellow in colour|
|One seeded||Many seeded|
|Stony/hard endocarp||Fleshy/Succulent/Soft endocarp|
|Fibrous mesocarp||Succulent mesocarp|
|Seed large||Seed(s) small;|
|Basal placentation||Axile placentation|
|Mesocarp and endocarp are fused||Mesocarp had endocarp are not fused|
(ii) Similarities between specimens S and T:
(I) Both have seeds
(II) both are fruits
(III) Both have three layers/epicarp/mesocarp/endocarp/pericarp/fruit wall
(IV) Coloured epicarp/pericarp
(V) Both have placenta
(VI) Both have thin epicarp
(VII) both have fleshy mesocarp.
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