NECO Biology Practical Questions and Answers 2020/2021 (Complete Solution)

NECO Biology Practical questions and answers 2020. Many NECO candidates find it difficult to answer the NECO Practical Biology correctly due to not understanding the questions. I will show you the best way to answer NECO Biology Practical questions PDF and make a good NECO result in your Biology examination.

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You need to understand the NECO Biology Practical making scheme before attempting any question so as to present your answers in such a way that it will look attractive to the examiner to earn you big marks.

Bear it in mind that every single procedure is awarded marks. So, ensure you do not skip any step while reporting and presenting your practical results. And do not forget to remember that neat labeling is very important.

You will be expected to carry out an experiment and report your observation. What you will see will not be far from the NECO Biology Specimen given to your school.

NECO Practical Biology Questions and Answers

Note: The 2020 NECO Practical Biology answers (expo) will be posted here on the day of NECO Biology Practical exam. Keep checking and reloading this page to know when the answers are posted. Do not forget to reload this page in order to see the answers.

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The questions below are for practice not the 2020 Biology Practical questions.

  1. (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

(i)

C/ButterflyD/Caterpillar
Wings presentWings are absent
Proboscis presentMandibles are present
Proleg absentMandibles are present
Legs are longerLegs are shorter
Claspers are absentClaspers are present
Has one pair of compound eyesHas simple eyes
Has antennaeAbsence of antennae
Osmeterium absentOsmeterium present
  

(ii)

C/ButterflyE/Grasshopper
Presence of proboscisPresence of mandibles
Clubbed/rounded/knobbed antennaeNot clubbed/rounded/knobbed antennae/tapering antennae;
Wing is membreneous/softHarder/less membraneous wings/forewings are leathery
Surface of wing is powdery/have scales/eye spotsSurface of wing is not powdery/absence of scales/eye spots;
Hind limbs/legs smaller/shorter/less muscularHind limbs/legs/larger and elongated/more muscular
Abdomen is hairyAbdomen 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 mosquitoJ/Adult cockroach
Smaller in sizeBig/large in size
A pair of wingsTwo pairs of wings;
Absence of hard hind wingPresence of hard hind wing/elytra;
Shorter antennaeLonger antennae
ProboscisMandible
Absence of maxillary palp/maxillaPresence of maxillary palp/maxilla
Thin legsThick/large legs;
Absence of spines on legsPresence 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 FruitSpecimen T/tomato Fruit
Green in colourRed/Yellow in colour
One seededMany seeded
Stony/hard endocarpFleshy/Succulent/Soft endocarp
Fibrous mesocarpSucculent mesocarp
Seed largeSeed(s) small;
Basal placentationAxile placentation
Mesocarp and endocarp are fusedMesocarp 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.

If you have any question about the NECO Biology Practical, kindly let us know in the comment box.

Last Updated on October 4, 2020 by Admin

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