2020 NECO-BIOLOGY-PRACTICALS-ANSWERS

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2020 NECO BIOLOGY PRACTICAL ANSWERS

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BIOLOGY PRACTICAL ANSWERS:

NECO-BIOLOGY-PRACTICALS-ANSWERS

(1ai)

Specimen; A is yam tuber

Specimen; B is cassava tuber

Specimen; C is quadrant

Specimen; D is insect net

Specimen; E is rain guage

Specimen; F is rice grain

Specimen; G is dry groundnuts seed

(1aii)

Specimen; A is propagated from small tubers

Specimen; B is propagated by stem

Specimen; F is propagated by seeds

(1aiii)

Specimen; C is used for for study of the distribution of an item over a large area.

Specimen; D is used for prevention against insects

Specimen; E is used to measure the precipitating rain

(1aiv)

Diagram of insect net.

(1bi)

(i)The surface of B turn blue-black

(ii)starch is present

(1bii)

Specimen; F grains (cereals)

Specimen; G puises (legume)

(1biii)

(i)The paper appears translucent

(ii) Specimen; G contain fat and oil or fat and oil is present in specimen G

(1biv)

Fat and oil

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(2ai)

Specimen; H is contour feather

Specimen; I is quill feather

Specimen; J is Filoplume

Specimen; K is millipede

Specimen; L is centipede

(2aii)

(i)They provide insulation to birds

(ii)Feathers allow for flight

(iii)Feathers are used for defense

(iv)Feathers are used for camouflage

(2aiii)

(i)Wings

(ii)Tail

(2bi)

Diagram of specimen I.

(2bii)

(i)Specimen; H serve as aerodynamic

devices for flight

(ii)Specimen; J are used principally as insulation, to conserve body heat.

(2biii)

Specimen; K belong to the class Diplopoda

Specimen; L belong to the class Chilopoda.

(2biv)

In tabular form

-Specimen; K-

(i)millipedes are more rounded.

(ii)Millipedes have two sets of legs per segment positioned directly under their body.

-Specimen; L-

(i)centipedes have a flatter body

(ii)Centipedes have one set of legs per segment positioned on the side of their body.

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(3ai)

Specimen; M is Grasshopper

Specimen; N is spider

Specimen; O is Larva (house fly)

Specimen; P is Larva ( mosquito)

Specimen; Q Flame of The forest flower

Specimen; R hibicuss flower

(3bi) 

(i) Anther

(ii) Filament 

They are generally called Stamen

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