NABTEB GCE Biology Practical Expo Answers (Nov/Dec 2017)

National Business and Technical Examination Board, NABTEB GCE Biology Practical Expo Answers For November/December 2017 Examination.

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See > NABTEB GCE Biology Expo Answers (Nov/Dec 2017)

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NABTEB BIOLOGY PRACTICAL ANSWERS

(1)
(i) Stamen (Filament,anther)
(ii) Pistil (Stigma,style,ovary)

(1b)
(i) Lassa fever
(ii) Ebola

(1c)
(i) Discouragement of deforestation
(ii) Formation of strict law/punishment for illegal removal of plants and bush burning.

(1d)
(i) Blood helps to transport materials, in the body including nutrients, water, salts and waste product.
(ii) Blood helps in body defences against disease, neutrophils and monocytes engluf and destroy invading microorganisms e.g bacteria.

(1e)
(i) Protozoa (chlamydomonas)
(ii) Bacteria (cyanobacteria =blue-green algae)
(1f) Ecosystem

(1g)
(i) Prevention of overgrazing
(ii) Discouragement of deforestation and planting of canopy trees.

(1h)
(i) It reduces/kill the living organisms of a soil surface.
(ii) It aid reduction of soil fertility

(1i)
(i) It leads to low production of crops.
(ii) It affect the availability of nitrogen to improve chlorophyll function.

(1j)
(i) By using wool as fuel
(ii) By construction of structure.

(1k)
(i) Smoke contain some green house gases which deplete the ozone layer.
(ii) Both affect respiration of organism when released to environment and microorganisms are avoided in dust.

(1L)
(i) Hinge joint
(ii) Hinge joint

(1m)
(i) Features that reduces water loss
(ii) Ability to collect and store water.

(1n)
Mendel’s first law of inheritance states that, the alleles of a given locus segregate into separates gametes.

(1o)
Dietary Deficiencies

(2aii)
(i) Amount of rain fall
(ii) Direction of wind
(iii) Wind speed

(2bi)
(i) Handle
(ii) Net
(iii) Funnel
(iv) Glass cylinder
(v) Measuring cylinder
(vi) Arrow
(vii) Net or mask
(viii) Measuring scale.

(2bii)
Ensure the funnel is fixed to the measuring cylinder to enhance accurate reading of water volume.

(3ai) Euglena

(3aii)
(i) Flagellum
(ii) Eye spot
(iii) Paramylum granule
(iv) Pellicle
(v) Nucleus
(vi) Food vacuole
(vii) Contractile vacuole
(viii) Eye spot

(3bi) Holozoic

(3bii) Flagellum (part1)

(3biii)
(i) It is used for detecting light
(ii) It is used for storage of starch.
(iii) It is used for food storage.

(4a)
(i) Lantern
(ii) Water trough
(iii) Feeding trough CH

(4b)
(i) Production of light (lighten source)
(ii) Storage of water for birds (poultry) consumption
(iii) Storage of food or supply of feed.

(4c)
(i) Lack of insufficient fuel
(ii) Bad engine to regulate the wick.

(4d)
(i) Fill the tank with fuel (kerosene) to provide heat to warm the bird (poultry)
(ii) Provision of light to save poultry from predators.
(iii) Enhance sorting of poultry.

(4e)
(i) Fire outbreak
(ii) Render feed useless if fallen by birds.

(4f)
(i) Electric bulb (electric source of light)
(ii) Rechargeable lamp.

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