Ceebookanswers - *NABTEB GCE 2018 BIOLOGY PRACTICAL ANSWERS:

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*NABTEB GCE 2018 BIOLOGY PRACTICAL ANSWERS:
Author: Mr. Dan
Posted on: 02:30:54 Wed, 14 Nov 2018


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*NABTEB BIOLOGY PRACTICAL ANSWERS:*

(1i)

Light meter



(1ii)

-Crabs

-Periwinkles

-Starfish

-Shrimps



(1iii)

-Carbon dioxide

-Oxygen



(1iv)

-Malleus

-Stapes

-Incus



(1v)

-Osmosis occurs in liquid medium only while Diffusion occurs in gases and liquids

-Osmosis occurs naturally in living organisms while diffusion occurs in living and non-living organisms



(1vi)

-Pairing

-Display



(1vii)

–There is absence of scent

–Flowers are usually dull coloured



(1viii)

It produces an oil called sebum that keeps skin moist



(1ix)

(i) Xerophyte:

-Possession of deep root structures

-Possession of thin or small leaves and waxy surfaces to retain moisture



(ii) Hydrophyte:

-Possession of large flat leaves on surface plants for floatation

-Possession of thin cuticle



(1x)

-wind

-Animals



(1xii)

-Myopia

-Hypermetropia



(1xii)

-It is used for detection of vibration and pressure in water



(1xiii)

-Shortage of food

-Epidemic



(xiv)

-Back pain

-Dark urine

-Dizziness



(1xv)

(a) Onion bulb: Bulb

(b) Cassava: Cutting



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(2ai)

A – Queen termite

B – Soldier termite



(2aii)

I - Compound eye

II - Spiracle

III - Abdomen

IV - Hardened cuticle

V - Antenna

VI - Mandible



(2b)

TABULATE:

Under A:

-Large abdomen

-Small head

-Patches of hardened cuticle present

-Absence of Mandible



Under B (Soldier)

-Small abdomen

-Large head

-Patches of hardened cuticle absent

-Present of powerful mandible



(2ci)

Phylum: Arthropoda

Class: Insecta



(2cii)

-Body covered with exoskeleton made of chitin

-Three pairs of jointed legs

-Abdomen is segmented

-Presence of spiracles on abdomen



(2di)

-It helps in aeration of the soil by burrowing inside the soil

-It is a good source of protein



(2dii)

Incomplete metamorphosis



(2diii)

-Grasshopper

-Cockroach



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(3ai)

The Human Eye (vertical section)



(3aii)

I - Sclera

II - Rectus muscle

III - Retina

IV - Yellow sport

V - Optic nerve

VI - Blind spot

VII - Ciliary body

VIII - Iris

IX - Lens

X - Conjuctiva



(3aiii)

II - It controls eye movement

III - It has light-sensitive cells called photoreceptors, which transforms these into light rays into electrical impulses.

(V) It transmits impulse to the brain

(VII) It holds lens in place

(IX) It helps to refracts and focuses light rays that enters the eye



(3b)

(i) Bright light: Muscles of the iris contract, making pupil small and reduce the amount of light entering the eye.

(ii) Dim light: It tends to expand in dim light



(3ci)

(i) Short–sightedness (myopia)

(ii) Long–sightedness (hypermetropia)



(3cii)

(i) Short sightedness is corrected by wearing spectacles fitted with concave or diverging lenses

(ii) Long sightedness is corrected by using spectacles fitted with suitable convex or converging lenses



(3d)

(i) Use clean water to wash face always

(ii) Avoid staying in areas containing fumes or smoke that can irritate eye



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(4a)

(i) Root

(ii) Bulb

(iii) Leaves

(iv) Tuber



(4b)

(i) Root

(ii) Leaves

(iii) Stem

(iv) Stem



(4c)

(i) Adventitious Root

(ii) Stem

(iii) leaves



(4d)

I - Stem cutting

II - Bulb

III - Rhizomes



(4f)

Anaerobic respiration in yeast



(4g)

Incase of overflow of the reaction



(4h)

Carbon(iv)oxide



(4i)

Ethanol



(4j)

10 degree C - 40 degree C



(4k)

Because the rate of reaction has decreased as a result of bridge in minimun and optimum temperature



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(5a)

A - Gametes

B - Zygotes



(5b)

(i) Parents: Black coat colors

(ii) Offspring: 3 black and 1 white



PLS NOTE: Draw circles (Here, my 0 is none shaded circe while @ is a shaded circle, so draw in your book, dont write this instruction ooo):

Parent - 00 00

Offspring - 00 0@



(5c)

(i) The genotype of the gamates are Bb and Bb

(ii) The genotypes of the offspring are BB, Bb, Bb and bb



WE ARE ALMOST DONE....................................... WAIT.................





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