“Some Candidates Forget “Expo” In Their Answer Booklets” – WAEC. see here>>>>>>


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In a hurry to submit their answer booklets to invigilators, some candidates forget their expo (materials used for examination malpractice) in the booklets, the West African Examination Council has said.

The council also noted that some other candidates use different answer booklets from its authorised copies.

Its Public Relations Officer, Mr. Demianus Ojijeogu, who confirmed this in an interview with our correspondent, however, added that the council had reduced the incidence of impersonation in its examinations through its biometric registration process.

He said:

“We encounter malpractice during the examination and during marking. Some leave the expo in the answer booklets. We see that all the time. Others use other answer booklets different from the council’s own. But, we discover these things during marking because the booklets do not have our serial numbers and they are not usually signed by the supervisors. Supervisors usually sign the booklets before they are given to the candidates.

“We have been able to handle impersonation through our biometric process but there is still collusion where candidates will copy exactly the same answers usually dictated by a teacher. We have our invigilators but the number is limited. When you leave the centre or before we get there, they will do what they want.”

He added that the council was still dealing with challenges of collusion, which involved teachers aiding candidates during examination.

Ojijeogu, who said that some candidates harassed supervisors, noted that the development had forced the council to adopt a more discreet approach in making announcements regarding examination malpractice.

“We no longer make noise about examination malpractice because examination supervision is a hazardous job. When candidates engage in malpractice, we just take their number and they fill a form. Some of our workers have been held hostage, female supervisors have been harassed. It is a hazardous job,” he added.

culled from PUNCH

Agric Agricultural Science (Practical) Waec GCE 2016 Free Expo Answers see here>>>>>>>


Agric Agricultural Science (Practical) Waec GCE 2016 Free Expo Answers

Thursday, 22nd September, 2016
Agricultural Science (Alternative t
Practical Work) 9.30am -11.00am

1)
1a)
Solar power (Sun)
1ai)
To determine d presence of micro Organism in a soil
1aii)
Lime water in flask. I will turned milky and lime water in flas II will remain clear
1aiii)
Shows that there are presence of micro-organism in d soil sample in flask I and there is respiration which turn lime water milky
1bi)
i)Vegetative propagation
1bii)
i)cocoa
ii)Kola
iii)coffee
1biii)
i)pollination agent which can be fail to perform successfully are not required
ii)the hazards of fertilizatiom are avoided
iii)the new plants mature fast because the offspring tend to acquires the wapbase.org age of the parent
iv)the offspring are true to types because there is no mixture of hereditary characters.
1c)
-advantage-
i)It increases photosynthesis activities
-disadvantages-
i)leads to high evaporation content in plant
==================================
2a)
Solar Power
2b)
i)for drying fishes
ii)to produce electricity
iii)heating farm steads
2c)
-Advantages-
i)It is easily available
ii)It is a very neat source of power
iii)it is very useful in farm photosynthesis
-Disadvantages-
i)it is expensive to store and harness
ii)The energy from the sun can be erratic.its wapbaze.com not possible to control it
iii)only available during the day
2d
I)Electrical power
II)Solar power
III)Mechanical power
Iv)Human power
V)Water power
==================================
3a)
I-comb
II-wattle
3bi)
i)Intensive system
3bii)
i)there is considerable reduction in labour
ii)allow hen to stand and sit
3biii)
i)Ensure hen is confined which permit
limited movement.
ii)allowing hen to stand comfortably
3biv)
i)ensure hen stand and sit comfortably
ii)ensure tightening of the cage
iii)ensure confined of the cage
iv)ensure permit of limited movement
3c)
i)fowl cholera
ii)pollurium
iii)cocidiosis diseases
==================================
4ai)
A:Green manure composting
B:Farmyard manure composting
4aii)
Fermentation
4aiii)
-It requires moisture for activities of microbes to take place
4aiv)
Sun
4bi)
-To introduce microbes
4bii)
-To produce organic matter for composting
4biii)
-To provide moisture for microbial activities
4c
-To increase random/general microbial activities
-To improve uniform mixture of water and animal dung
-To ensure proper/maximum microbial activities
4di)
Mixer
4dii)
For mixing compost component
4e)
To avoid activities of other microbes that can cause damage to the crops

Chemistry (OBJ And ESSAY) Waec GCE 2016 Free Expo Answers see here>>>>>>>


Chemistry (OBJ And ESSAY) Waec GCE 2016 Free Expo Answers
+++++++++++++++++++++++++++++++
Tuesday, 20th September, 2016
Chemistry (obj and essay) 9.30am
+++++++++++++++++++++++++++++++
CHEMISTRY OBJ:
1-10: ADCCADAADA
11-20: DCCBADDBCC
21-30: CBAACDDDAB
31-40: CACCBDDADB
41-50: ADBCDADBBA
1a)
i)they are relatively of low cost
ii)They have high heat resistance
1bi)
draw the structure
H H
H-C-C-H
Br Br bromoethane
1bii)
bromoethene
1c)
Because Ethanol is less denser than water
1di)
Le Châtelier’s principle, states that if a system in equilibrium is disturbed by changes in determining factors, such as temperature, pressure, and concentration of components, the system will tend to shift its equilibrium position so as to counteract the effect
1dii)
i)F2+2NaOH—–>NaOF+NaF+H20
ii)Cl2+2NaOH—–>NaOCl+NaCl+H20
1dii)
i)K2SO3 has been oxidized
ii)Ag^2+ has been oxidized
1e)
dynamic equilibrium is a steady state reached when a reversible reaction occurs at the same rate in both directions and has an unchanging ratio of products and reactants.
1f)
diagrams
(k)** (k)** (2) (k)** (k)**
1g)
because it attains equilibrium at very fast rate
1hi)
i)electrovalent bonding.
ii)covalent bonding
1hii)
Aufbau principle states that hypothetically, electrons orbiting one or more atoms fill the lowest available energy levels before filling higher levels (e.g., 1s before 2s). In this way, the electrons of an atom, molecule, or ion harmonize into the most stable electron configuration possible.
1i)
The outer electron in aluminium is in a p sub-level. This is higher in energy than the outer electron in magnesium, which is in an s sub-level, so less energy is needed to remove it.
1j)
i)Substitution
ii)addition
=============
====================
(2ai)
Vander waal’s force are weak intermolecular gases at room temperature.
(2aii)
-Electronegativity difference
-Ionization energy
(2aiii)
-Ionization energy
-Electron affinity
(2b)
C-F and C-O
C-N and C-H-O and C-N and C-F and C-O
(2ci)
-Be=1S^22S^2
4Mg=1S^22S^22P^63S^2
They both have the same number of electron in the outermost shell
(2cii)
Mg^2+->Na^+->Ne
The size of positive ion is less than that of the neutral atom
(2bii)
C-F>C-O>C-N>C-H(order of polarity).
(2ci)
4Be=1S^2 2S^2
12mg =1S^2 2S^2 2P^6 3S^2.
(2cii)
4Be and 12Mg have similar chemical properties because they belong to the same group in the periodic table. Both 4Be and 12Mg belongs to group II in the periodic table hence they have similar chemical properties.
(2di)
Transition element: Transition elements are those element with partially or incompletely filled d-orbital. Transition metal form coloured ion (or compound), they acts as catalyst,they have variable oxidation stat, they are paramagnetic, they form complex compound or coordination compound
(2dii)
Most transition metals have variable oxidation state because they undergo bonding with the electron in the ns and (n-I) d-orbital .e.g. most of the first series of transition metal from scandium to Zinc have variable oxidation state because they undergo bonding with electron in 4s and 3d- orbital.
(2diii)
(i) Metals are used in electroplating
(ii) Metals are used in making electronic cables and cooking utensils because they are good conductor of heat and electricity.
(2div)
It is used in electroplating and galvanizing to make electrical cable
================================
(3ai)
Crystallisation is a separation technique that is used to separate a solid that has dissolved in a liquid and made a solution. The solution is warmed in an open container, allowing the solvent to evaporate, leaving a saturated solution.
(3aii)
Evaporation is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure.
(3aiii)
Filtration is any of various mechanical, physical or biological operations that separate solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass.
(3bi)
(i)Their Melting and Boiling Points increases down the group
(ii)Their atomic Radius increases down the group
(iii)Their Ionization Energy: decreases down the group
(3bii)
4NaOH(aq)+2F2(aq)->4NaF(aq)+O2(g)+2H2O(l)
Cl2(g)+2NaOH(aq)->NaOCl(aq)+NaCl(aq)+NaCl(aq)+H2O(l)
(3ci)
Gas is a state of matter while vapour is the gaseous state of substance in equilibrium with its liquid or solid state
(3cii)
Normal temperature and pressure
(3di)
Mg(s)+Cl2(g)->MgCl2(s)
(3dii)
n=mass/molarmass
n=24/35.5
n=1.2/24
n=0.05
number of moles=volume used/molar volume
0.05=V/22.4
V=1.12dm^3
(3e)
-Atomic number is the number of protons present in an atomic nucleus of the element
-Mass number of an element is the sum of the protons and neutrons in the atomic nucleus of the element
(3f)
diagrams
( k )** ( k )** ( 2) ( k )** ( k )**
(3g)
Because it attains equilibrium at very fast rate
========================================
(4ai)
Hard water is water which does not lather readily with soap. Hard water is formed when water percolates through deposits of limestone and chalk which are largely made up of calcium and magnesium carbonates.
(ii)
-Temporary hardness: Ca(HCO3)2
-Permanent hardness: Na2C03
(iii)
-By using chemicals like caustiic soda.
-By using permutot OR zeolite
(4bi)
(i) coagulation
(ii) sedimentation
(iii) filtration
(iv) chlorination/disinfection
(4bii)
(i) Sodium chloride
(ii) Potassium chloride
(iii) Chlorine dioxide
(4ci)
Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent.
CHEMISTRY OBJ:
1-10: ADCCADAADA
11-20: DCCBADDBCC
21-30: CBAACDDDAB
31-40: CACCBDDADB
41-50: ADBCDADBBA
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Government (OBJ And ESSAY) Waec GCE 2016 Free Expo Answers

Tuesday, 20th September, 2016
Government (Essay& Objective) 2-5.00pm

==========================
GOVERNMENT OBJ:
1-10: CACDBDADBB
11-20: DBBCABAAAA
21-30: ACAABADDCD
31-40: BABAADACCA
41-50: CCCDCBCABD


=====================
1a
Delegated legislation is the term usually applied to rules and standards that a legislative body has not gone to the trouble of writing itself, but has left to an administrative bureaucracy to work out on its own. Strictly speaking, as the State of Wisconsin explains in its own primer on the subject, states with a separation of powers cannot delegate lawmaking away from the legislature. Nevertheless, the doctrine persists in law.
1b)-To give room for flexibility
-To conform to local needs
-To bring government closer to the people
-To use in the period of state of emergency
=========================
2a. Judicial review is a process under which executive and (in some countries) legislative actions are subject to review by the judiciary.
2b. 1. The independence of the judiciary shall be guaranteed by the State and enshrined in the Constitution or the law of the country.
2. The judiciary shall decide matters before them impartially, on the basis of facts and in accordance with the law, without any restrictions, improper influences, inducements, pressures, threats or interferences, direct or indirect, from any quarter or for any reason.
3. The judiciary shall have jurisdiction over all issues of a judicial nature and shall have exclusive authority to decide whether an issue submitted for its decision is within its competence as defined by law.
4. There shall not be any inappropriate or unwarranted interference with the judicial process, nor shall judicial decisions by the courts be subject to revision
====================
3a)Monarchy form of government is a system of government where the king or queen rules.This system of government is hereditory in nature
3b
monarchy:mornacy is a system of government where the king or queen rules.This system of Government is hereditary in nature
– – – 3B
Forms of Monarchy:
I)Absolute Monarchy:This is where the power of the king or queen is unlimited
Ii)constitutional monarchy:This is where the power of the king or queen is limited.The king or queen is not above the law.
==========================
6a)It is a policy which was usually forced upon indigenous peoples to change them into their European or European-American counterparts. White people felt that natives needed to be civilized according to to their values and they also felt that natives could not assimilate into white cultures unless they acted like they were white.
b)
-it required total rejection of African culture
-emergency of nationalist movement
-ambition of slave trade
-alienation of the elite
9a)
concurrent list this is the power excercised by the federal government and component unit
9b)
i)difference in culture
ii)expansive to manage
iii)it breeds section conciousness
iv)uncessary duplication of organ of government
=============
10)
Achievement of common wealth to Nigeria:
a)it exerts pressure on member states to respect human rights.Nigeria was suspended from the organisation in 1995 for human rights violation. It was readmitted in May 1999
B)It sometimes provides assistance to victims of war and natural disasters
C)It fosters co-operation in areas of sports and cultural exchange programmes among member nations
D)it meets periodically to review relationships between member states
==========================
GOVERNMENT OBJ:
1-10: CACDBDADBB
11-20: DBBCABAAAA
21-30: ACAABADDCD
31-40: BABAADACCA
41-50: CCCDCBCABD
=====================
ANSWERS SHALL BE POSTED HERE FOR FREE
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Mathematics Maths (OBJ/ESSAY) Waec GCE 2016 Free Expo Answers see here>>>>>>>>


 

+++++++++++++++++++++++++++++++
Saturday, 10th September, 2016
General Mathematics (Essay&Obje
9.30am-3.30pm
++++++++++++++++++++++++++++++

Dear Candidate
Here Are The Symbol To Be Use For Physic And Mathematics Exam
PHYSICS AND MATHEMATICS SYMBOLS TO BE USED FOR EXAM

/ means DIVISION

* means Multiplication

tita You Should Know that.

rais means Raise to power

Or

^ means Raise to power

sqr rut/square rut means Square root

—-(1) means Equation 1

yr means Year

f(x-xbar) means x MINUS x BAR as in statistics which means that MINUS will be on Top of x.

, (Comma) means NEXT LINE, This means that The Following Number is Under The Number its Following ie. UNDER. It is usually used during STATISTICS when drawing a table.

EXAMPLE 1.

X: 1,2,3,4,5,6

FX: 4,6,8,10,12

FX-Xbar: 10,8,6,4,2,1

DRAW A TABLE WITH

X|FX|(FX-Xbar)

The above statement means that:

~For X, it has 1 2 3 4 5 6 under it. which means 1 is under 2, 2 is under 1, 3 is under 2, 4 is under 3 and so on…

~Under FX you have 4, then 6 under 4, then 8 under 6, then 10 under 8, then 12 under 10…..

~Under FX-Xbar you have 10, then 8 under 10, then 6 under 8, then 4 under 6, then 2 under 4, then 1 under 2….

ANOTHER EXAMPLE:

Class interval: 60-64,65-69,70-74,75-79,80-84,85-89,90-94,95-99.

X: 62,67,72,77,82,87,92,97.

F: 2,3,6,11,8,7,2,1.

FX: 124,201,432,847,656,609,184,97.

F(x-x bar)2: 561.12,414.18,273.36,33.66,84.48,476.42,351.12,333.06

MEANING OF THE ABOVE EXPRESSION

Bar means Minus on top of d number or Variable and comma means next line which means each of them are unda. Eg 60-64 is unda Class interval, then 65-69 is unda 60-64,etc .So comma means unda.

NOTE : When You See Something Like the above to Examples, You are requered to Draw a Table.

========================

WARNING : Please Study the above Symbols, If you Dnt want to write Rubbish in you MATHEMATICS Exam Or Calculation Exam

NOTE THAT ANSWERS ARE ARRANGED ACCORDINGLY, SO ALWAYS SCROLL DOWN TO SEE NEW/MORE ADDED ANSWERS

MATHEMATICS ANSWERS INFINITYGURU]

Use this
1a )
6whole 1 / 2 – 3 whole 2/ 5 / 2whole 1 / 2 – 1 whole 3/ 5
25 / 4- 17 / 5 , / 5/ 2- 8/ 5
125 – 68 / , 20 , / 25 – 16,
/ 10
==> 57 / 20 / 9/ 10
=57 / 20 /9 / 10
=57 / 20 x 10 / 9
=57 / 20 x 10 / 9

=57 / 18
= 3whole 1 / 6
=======

3a)
c= -1, y= -3, z= -4 and w= -7
x^2 – y^2 / 2w – z
(-1)^3 – (-3)^2 / 2(-7) -(-4)
= -1-9/+4+4 = -10/-10
= 1

3b)
< MQN + < NQO = 90 degree
< MNQ + 46 = 90 degree
< MNQ = 90 – 46 degree
< MNQ = 44 degree
Considering < MNQ
y + n + MQN = 180 degree
y + 44 + 44 = 180
y = 180 – 88
Y =92 degree

4a)
2/3(1-4x) -1/2(5-3x) less/equal to 1/4(7+9x)-1/3
multiply through by 12
8(1-4x) -6(5-3x) less/equal to 3(7+9x)-4
8-32x-30+18x less/equal to 21+27x-4
-32x+18x – 27x less/equal to 21-4+30-8
-41x less/equal to 39
x less/equal to -39/41

4b)
DRAW THE ANGLE
from DTMR/
Tan65degree = TR/3
TR = 3Tan65
= 3 x 22.1445
From DRMB
Tan20 = RB/3
RB = 3Tan20
= 3 x 0.3640
= 1.092m

H = TR+RB
= 6.4335 + 1.092
= 7.5255
= 7.53m

5)
Area of shed segment = Area of Sector – Area of Triangle
=Φ/360*πr^2 – (½abSinc)
=$90/360*22/7*7^2) – ½*7*7*sin90`
=154/4 – 42/2
=(754-98)/4
=56/4
=14cm^2
Cost of painting it =14*750
=N10500
========

6a)
Taxable income = x
25/100 x x/1
= 14,000
25x=1400000
X=1400000/25
X= 560000
Total income =
56,000/4 x 5
=70,000

6b)
Education = 2/5
Clothes = 1/6
Food = 3/8
Expenditure = 2/5 + 1/6 + 3/8
48+20+45/120
= 113/120 * 36,000/1
Le 39,000
Savings annually = Le 21,000
To save Le 63,000.00
To save Le 63,000/2100 yrs
= 30 years

(7a )
diagram

(7b )
Angula difference in long (tita)=42 – 12
tita=30 degree

(7bi )
lenght of chord Xy=2 Rsin tita /2
XY= 2*6400*Sin 30 /2
=2 *6400*sin 15 degree
=12800 *0. 2588
=3 . 312 . 64 km
=3312. 64 km
=3310km (to the nearest 10 km )

(7bii )
let the angle that the chord xy substends at the centre of the earth be alpha degree
diagram
sin alpha/ 2= opp / hyp =/ NY/ / 6400
/NY/ = 1/ 2 /XY /= 1/ 2 * 3312. 64
=1656. 32 km
sin alpha/ 2= 1656. 32 / 6400
sin alpha/ 2= 0 . 25888
alpha/ 2= sin ^ – 1(0. 2588)
alpha/ 2=14 . 999
alpha=14 . 999 *2
alpha= 29 . 998
alpha= 30 . 0 degree (to 1 dp )

(7biii)
XY bar= tita/ 360 * 2 pie R cos lat
=30 degeree / 360 * 2*3 . 142 * 6400* cos 60
XY bar= 30 / 360 * 2* 3. 142 * 6400* 0. 5
XY bar= 1675. 73 km

8a)
Drawing
8bi)
Using Pythagoras theory
|xz|² =550²+320²
= 302500+102400=404900
xz=√404999
=636km(3 s.f)
Total distance = 320+550+636
= 1506km

8bii)
Using SOHCAHTOA
Tan z = 320/550
Z= Tan-¹ (320/550)
Z= Tan-¹(0.5818)
Z = 30°
From the diagram in 8a
Bearing of X from Z = 55+30
= 085° or N85°E

9b)
Distance= speed * time
Distance= 3km/h * 3mins
= 3000m/60min * 3min
=50*3 =150min.

9bi)
Circumference= 150m
2π(r+1) = 150
22/1 * 22/7 * (r+1)= 150
r+1= 150*7/44
=1050/44
r+1 = 23.9 ≈ 24 to the nearest whole number.
r+1= 24
r=24-1 = 23min

9bii)
Volume of cylinder=πr²h
Volume= 22/7 * (23)² * 8
22/7 * 529/1 * 8/1
= 93104/7 = 13,300.57
13301m³ to the nearest whole number

10 a )
GIVEN : y = 2X ^2 – 3X – 1
When x = -3
Y = 2(- 3)^2 – 3(- 3) – 1 = 18 + 9 – 1 = 26
When x= – 1
Y = 2(- 1)^ 2 – 3 (-1 )-1 = 2+ 3- 1 = 4
When x = 1
Y = 2(- 1)^ 2 – 3 (1)- 1 = 2 – 3 – 1 = -2
When x = 2
Y =2 (2)^2 -3 (2)- 1= 8 – 6 – 1 = 1
When x = 3
Y = 2(3)3 -3 (3)- 1 = 18 – 9- 1 = 8
When x = 4
Y = 2(4 )^3 – 3(4 )-1 = 32 -12 – 1 = 19

TYPING IN PROGRESS
PLEASE BE PATIENT
=======================
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=======================

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Biology Practical Waec GCE 2016 Free Expo Answers
Free Biology Practical expo Waec GCE 2016 Free Expo Answers
+++++++++++++++++++++++++++++++
Monday, 5th September, 2016
Biology 3 (Alternative to Practical
2.00pm – 4.00pm
+++++++++++++++++++++++++++++++
(1a)
(i)Onion bulb
(ii)Bulb
(iii)It has a swollen stem
(iv)
I-Membraneous leaves
II-Outer scaly leaves
III-Thick fleshy storage leaves
IV-Auxillary buds
V-stem
VI-Roots
v)It is stored in the fleshy leaves
vi)
II-It protect the inner leaves
III-It stores food for the plant
VI-It absorbs nutrients from the soil
(1b)
(i)Epicarp
(ii)Mesocarp
(iii)Endocarp
(iv)Hollow containig water
i-protects the seed and makes fruit to float on water
ii-makes the fruit to be bouyant in water during dispersal
*Fleshy drupe
-It is fleshy
-It consists of epicarp,mesocarp and endocarp ie thin epicarp,fibrous mesocarp
*Palm nut,mango
*water,man
vii)
-It is used as food for man
-It is used as an ornament plant
It is used for making oil
-The fibrous mesocarp is used for cooking
(2a)
i)Arthropoda
ii)Insecta
(2b)
i)For phylum:
-Presence of jointed appendages
-Presence of chitinous exoskeleton
ii)For class
-Presence of three pairs of walking legs
-Presence of segemented body parts
(2c)
i)Organism D is male
ii)Presence of anal style
(2d)
i)D has anal style while G does not
ii)The terminal end of G’s abdomen is modified into a boat like structure for carrying egg case
iii)D has larger antennae
(2e)
i)D has wings for flight and escape production
ii)F is smaller and could hide easily in crevices
=================
(4ai)
I-Foilage leaf
II-Epicetyl
III-Tap root
Iv-Routlets
V-Split testa
VI-Radicle
VII-Cotyledon
(4aii)
I-It is the primitive leaf which manufactures food for the seedling
II-It functions as the primitive stem for seedling
V-It protect the inner parts of the seedling before germination
IV-It absorbs nutrients from the soil
VII-It provides food for germination
VI-It grows to form the root of the seedling
(4bi)
Epigeal germination
(4bii)
Cowpea,groundnut,castor
(4biii)
-The seed requires warmth,water,viable seeds etc for germiation
-The seed absorbs moisture and become swollen
-The seed splits ,the radicle grows to form the root while the plumule form the shoot
(4ci)
It is carried above the soil level as a result of elongation of the epicotyl
(4cii)
Cotyledon
(4ciii)
Carbonhydrate
(4d)
-Viable seeds
-Warmth
-Moisture
-Enzymes
================
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Saturday, 3rd September, 2016
English Language 2 (Essay) Englis
Language 1 (Objective) 9.30am – 1
English Language 3 (Test of Orals)
3.30pm – 4.15pm
+++++++++++++++++++++++++++++++
ENGLISH LANGUAGE Waec GCE 2016

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Friday , 2nd September, 2016 Biology (Essay& Obj) 9.30am -12.0 ++ see full answers here>>>>>>


+++++++++++++++++++++++++++++++
Friday , 2nd September, 2016
Biology (Essay& Obj) 9.30am -12.0
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BIOLOGY OBJ:
1-10: ABBCCCDCCA
11-20: AABAADBDBC
21-30: BAAAADCCBC
31-40: CDADCCCBBB
41-50: CACAAABCAC

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WAEC GCE 2016 BIOLOGY ANSWERS
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1a)Plants take in some compounds like carbon dioxide through their leaves. They absorb some other materials such as compounds of nitrogen, phosphorus, etc., from the soil through their roots.
the transport system consists of tube like passages made up of vascular tissue. There are two types of vascular tissues in plants—xylem and phloem.
The vascular aanuadey system extends from the roots through the stem and continues up to the leaves. In the leaves it is clearly seen as a pattern of veins. Water and minerals are transported from the roots upwards through the xylem tubes.
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(2ai)
Enzymes are organic catalyst which speed up the rate of chemical reaction but remain chemically unchanged at the end of the reaction

(2aii)
-They are protenious in nature
-They are specific in nature
-They are usually involved in reversible reactions
-They are PH dependent
-They are temperature dependent
-They remain chemically unchanged at the end f the reaction

(2b)
Pancreatic juice contains erepsin,maltase,sucrase and lactase
-Erepsin converts polypeptides to amino acids
-Maltase converts maltose to two glucose
-Sucrase converts sucrose to glucose and fructose
-Lactase converts lactose to glucose and galactose

(2c)
The casts act as mould for setting the fractured bone,milk is rich in proteins ad vitamins is good for growth while sun helps to synthesize vitamin D which aids bone formation

(2d)
-Provision of food
-Recycling of nutrients
-provision of oxygen
-Removal of pollution
-It serves as building block for other substance
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(3ai)
-Virus
-Bacteria
-Protozoan

(3aii)
Bacteria eg Staphlococcus aqreus
-Fungi eg Rhizopus nigricans
-Virus eg Influenza virus

(3aiii)
-By sterilization
-Use of antibiotics
-Hygenic and sanitary practices
-Use of chemotherapy

(3b)
-Salinity
-Oxygen
-Temperature
-Turbidity

(3ci)
-Bush burning
-Continous cropping
-Overgrazing

(3cii)
-Loss of medicinal benefits of extinct species
-Disease invasion
-Scarcity of product of extincted species
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6a)
i)mimicry is a similarity of one species to another that protects one or both.
An example of this is the cuckoo bee.
ii)Camouflage is the structural adaption that enables specie s to blend with their
surroundings; allows a species to avoid
detection by predators.

6b)
i)Their legs are adapted for running
ii)They adapts the leathery forewings as
temina to provide a protective cover for the second set of wings.
iii)they evolved mandibles to bite and chew solid food.

6c)
i)It reduces the quality and quantity of the crops
ii)it reduces their productivity

6d)
i)by refrigerating
ii)by salting
iii)by drying
iv)by the use of silos

6e)
i)in medicine
ii)in crime detection

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(6f)
-Inadequate space
-Inadequate light
-Inadequate water
-Inadequate nutrient

(6g)
It is a long term gradual series of changes occuring in structure,composition,variety and number of species in an area till a stable community is reached

(6h)
-It reduces soil fertility
-It reduces soil micro organism
-It causes soil leaching
-It reduces soil aeration

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