2018 Free WAEC GCE Biology Practical/Specimen Answer/Expo Now Available

WAEC GCE 2018 Biology Practical/Specimen Questions And Answers post for free, WAEC GCE 2018/2019 Biology Practical/Specimen Objectives and Essay Questions And Answers expo

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2018 Free WAEC GCE Biology Practical/Specimen Answer/Expo Now Available

BIOLOGY-PRACTICALS

*BIOLOGY PRACTICAL*
*NO. 1*

Functions
(I) to help the sperm gets through the egg’s protective coat and to allow the plasma membrane schoolcollege.ng the sperm and egg to fuse

(III) to associate with sperm cap agitation, Acrosome reaction and sperm – egg fusion

(VI) they conduct electrical messages to the Neuron cell body for the cell to function

(VII) conduct electrical impulses away from the cell body

2ai)
A Sex male
B Sex female
2aii)
A – Because is a sperm cell tum
Because D is an enoumerom
2b)schoolcollege.ng
The letter X between cliedram A and B
represent mating (crossbreeding)
2bi)
– testis
– Sperm Cell
– Union
– Zygote
2cii)
i)Because it whene Sperm Cell Que formeel
ii) because it has head and tail on for movement
iii) Because the sperm colegg fuse together
iv) it is the product of the Union
2d)
The process is meiotic twisiors
=========================================
4a)
Vertical section of a human skin
4b)schoolcollege.ng
i- hair shaft
ii- sebaceous gland
iii- erector muscle
iv- sweat gland
vi- blood vessel
vii- fatty cells
viii- cold sense receptor
ix- dermis
x- epidermis
4b)
i) excretion
II) maintenance of a suitable constant body temperature
iii) storage of reserved food
iv) protection
v) osmoregulation
4c)
low – constricts
high – contracts
4d)
VI) transfers oxygen and nutrients to the skin schoolcollege.ng
VIII) responsible for sensitivity of the skin to light
X) provide a water proof Barrie’ and create our skin tone
4e)
i) hot day
-vasodilatation
-sweating and cooling
-skin relaxation
ii)Cold day
-vasoconstriction
-Erector muscle contract
-skin assume erect position with trapped in between
4f)
victim D
4g)
i)bathing with soap and water
ii)exposure to fresh air
iii)check up on disease break out
iv)exposure to sunlight

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