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Waec 2017 Biology Practical Answers – May/June Expo

Bio- Pract – ANSWERS
Bio

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1 ai )
i ) Arthropoda
1 aii )
i ) They have segmented bodies
ii ) Their bodies are divided into head , thorax and abdomen
iii ) They have jointed appendages
iv ) They have exoskeletons
1 bi )
In tabular form
sp C
i ) It has wings
ii ) It has jointed legs
iii ) It has antennae
iv ) It does not have clasper
sp D
i ) It does not have wings
ii ) It does not have jointed legs
iii ) It does not have antennae
iv ) It has clasper
1 bii )
sp C
i ) the antennae are not segmented
ii ) The eyes are smaller
iii ) It has labial palps
sp E
i ) The antennae are segmented
ii ) The eyes are larger
iii ) It does not have labial Palps

2 ai)
i)Carrot is good source of vitamin .
ii )It is a source of diet that improve vision
iii )it is used in production of juice
2 aii )
i)It is a good source of carbohydrates
ii )It supplies Energy
iii )It serve as primary producer for heterotrophs

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2b)
F – Is a root & tuber
G – is a stem & tuber
2bii) Specimen F
– it has an adventitious root
– it has bud at the base
Specimen G
– It has some bud on its surface
– it is a swollen end of of a special underground plant.
2c)
H – Class is Insecta
J – Class is insecta
Different btw H & J
Specimen H
– it has proboscis
– it is smaller than J
– it feed on blood
– it has no color
SPECIMEN J
– It has Labrirum
– It is Larger
– it feed on abandon food
– it is dark brown

4ai)
phylum Annelida
4aii)
i)Body is elongated and vermiform.
ii)It has segmented body
4aiii)
Underground
4bi)
i)Their streamlined shape allows them to burrow through soil.
ii)They have no skeletons or other rigid structures to interfere with their movement.
(4bii)
i)they improve the fertility of soil in different ways.and therefore they are important in agriculture
ii)they also reduced the the alkalinity and acidity of the soil to provide better conditions for plant growth.
iii) they are used for bait and food.as bait they used it in catching fish.

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Adeyemo Adewale Ayomide is the founder and editor of MyEduJobNews. He loves to share education news from various sources to keep readers informed. Chat Him Up On Facebook and Twitter.

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Myedujobnews Official

Adeyemo Adewale Ayomide is the founder and editor of MyEduJobNews. He loves to share education news from various sources to keep readers informed. Chat Him Up On Facebook and Twitter.

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