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WAEC 2017 Biology Practical Answers

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WAEC 2017 Biology Practical Answers by : 12:00 am On April 21, 2017

WAEC 2017 Biology Practical Answers

4ai)
phylum Annelida
4aii)
-Body is elongated and vermiform
-It has segmented body
4aiii)
Underground
4bi)
-Their streamlined shape allows them to burrow through soil
-They have no skeletons or other rigid structures to interfere with their movement
4bii)
-they improve the f*******y of soil in different ways.and therefore they are important in agriculture
-they also reduced the the alkalinity and acidity of the soil to provide better conditions for plant growth
– they are used for bait and food as bait they used it in catching fish
4c)
DIAGRAM
4d)
S – Drupe
T – Berry
4e)
Tabulate:
Specimen S|Specimen T
-The seed is not many|-The seeds are many
-It has seed chamber|-It does not have seed chamber
-It has oval shape|-It has a spherical shape
-It has no sepal attached|-It has sepal attached
4e)
-They both have succulent mesocarp
-They both have thin epicarp
-They both have seeds
-They both have endocarp

1ai)
Arthropoda
1aii)
-They have segemented bodies
-Their bodies are divided into head,thorax and abdomen
-They have exoskeleton
1bi)
TABULATE
Specimen C|Specimen D
-It has wings|It does not have wings
-It has jointed legs|It does not have jointed legs
-It does not have clasper|It has clasper
1bii)
TABULATE
Specimenc C|Specimen E
-The antennae are not segemented|The antennae are segemented
-The eyes are smaller|The eyes are bigger
-It has labial palps|It does not have labial palps
1c)
They are both insects
1di)
Leaf of a plant
1dii)
-Posession of spiracle for breathing
-Posession of hooks for attachment
1e)
DIAGRAM

2ai)
-It has venation leaves
-It is pink in color
-It has lateral leaves
2aii)
G – Irish potato
-It has dormant bud
-It has vascular ring
-It has periderm skin
-It has medulla
2bi)
F – Root tuber
G – Root tuber
2bii)
Specimen F
-They store their food in the root
-They are harvested through the root
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
TABULATE
Specimen H|Specimen J
-it has proboscis|-It has Labrirum
-it is smaller than J|-It is Larger
-it feed on blood|-it feed on abandon food
-it has no color|-it is dark brown
2dii)
-They both have wing
-They are both active in the night
-They both breadth with aid of trachea system
-The body is divided into head thorax & abdomen
2ei)
H – as proboscis for sacking blood
J – It as Labrirum for bitting & chewing
2eii)
-has a pair of antenna for preserving food
-Has a bitting& chewing mouth part.

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