Waec 2015 Biology Practical Answers will be posted free of charge

Waec 2015 Biology Practical Answers will be posted free of charge

(4ai.) Specimen L ------- Terrestrial habitat
Specimen M ------ Terrestrial habitat Specimen
N -------Terrestrial habitat
II. Specimen L --------- Photosynthesis/ autotrophic. Specimen M -------- Biting and chewing / heterotrophic Specimen N --------Saprophytic iii. Specimen L ----- They are green plants therefore they are able to produce their own food through photosynthesis. Specimen M ----- They have maxilla and mandibles that are adapted to bite and chew grasses.

(4bi.) They all lives in the same habitat and they depend on each other to survive. Freshly uprooted grass ----- grasshopper-------- Mushroom
(ii.) sources of food for man. reduction of crop yields.
(iii.) Using of insecticides.

No1
1a) Division;-Magnoliophyta Class;-Magnoliopsida

1b) i) A-Spiral
B-Opposite
ii) A-swordlike
B-Oval/Oblong

c) i)A-smoooth
ii)A-alternate venation
B-Net venation

(1d)
(i) -They both have Narrow leaf
-They both have Green colouration of leaf
-They are both angiosperm They are both dicotyledinous plant (ii) -Specimen A contains many leaves whie specimen B contains fewer leaves
-Specimen A is darker in colour while specimen B is lighter in colour
-Specimen A posses hard stem while specimen B posses succulent stem
-Specimen A has scaly appearance while specimen B does not have scaly appearance

(3a) specimen c= Tilapia fish specimen
d= Toad

(3b) specimen c is pisces specimen d is amphibians

(3c) Aquatic habitat

(3d) tabulate
specimen c
i. They have simple eye
ii. They have fins for movement in water

specimen d
i. They have bugly eye
ii. They have two pairs of limbs

(3dii) 1. They have gills for gaseous exchange
2. They have two- chambered heart

(2ai) G-Arthropoda
H-Arthropoda

(2aii) 1-possession of exoskeleton of chtin.
2-possession of joint appendages.

(2b) G-Mandible.
H-Mandible

(2ci) G-Arboreal
H-Termitarium

(2cii) G: 1.Worker bee is a source of formic acid.
2.It a source of income
H: 1.it increase the nutrient of the soil.
2.It destroys farm produce.

D
i M- Aves
N - pisces
P - vertebrata
ii . Protein of the organism
I ii . M
I .Absense of sweet pore
2 .Presence of barbs
3 .Presence of Rachis
4 .Presence of shaft

P
1 .Presence of sweet pore.
2 .Absence of barbs
3 .Absence of rachis
4 .Absence of shaft

E
1 .inferid umbilicus attaches the specimen the skin of the bird.
2 .Rachis hold the barbs in place .
3 .The barbs insulate the body.

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