BIOLOGY ESSAY AND OBJ EXPO

====================================
2019 WAEC GCE BIOLOGY ANSWERS
====================================
Obj:pls disregard all fake solutions roaming about online and use this obj 100% legit
BIOLOGY OBJ
1-10: BACCCBBACA
11-20: BAABCBBBAA
21-30: ADDAAACDAA
31-40: BADADDBCBB
41-50: CBDACDCABA
====================================
Essay

(1a)
Osmosis is defined as the flow of water or solvent molecules from a region of dilute or a weaker solution to a region of concentrated or stronger solution through a selectively or differentially permeable membrane

(1bi)
Draw the experiment
[CLICK HERE]

(1bii)
The sugar solution in cavity of yam will remain the same. Therefore osmosis will not take place

(1biii)
Osmosis did not occur because the semi permeable membrane of yam cells was destroyed by boiling which did not allow movement of water into the solute (sugar) molecules

(1c)
(i) Potato
(ii) cocoyam
====================================
(2a)
TABULATE
Food substances|Two test reagents
Reducing sugar|Fehling's solution and benedict solution
Protein|Biuret solution and Million's solution
Fats and oil|Sudan(III) solution and

(2b)
TABULATE
Digestive enzyme|Location of production of enzyme|Site of action
Maltase|Small intestine(Ileum)|Walls of small intestine
Lipase|Duodenum|Liver
Sucrase|Small intestine(ileum)|Walls of small intestine
Amylase|Ileum or duodenum|Liver

(2ci)
Get a fresh leaf
-Wash in a clean water
-Boil in warm/hot water to soften it
-Put in alcohol to kill the cells and to remove the cholorophyll, thus the leaf is destarched

(2cii)
The starch is converted to simple sugars or simple carbohydrates|glucose

(2di)
To kill the protoplasm

(2dii)
To remove chlorophyll

(2diii)
To soften it
====================================
(6a) A Biennial plant is a flowering plant that takes two years to complete its biological life cycle
A Perennial plant is a plant that lives more than two years

(6b)
Characteristics of Carnivorous Plants

(PICK 4)
-Nitrogen Deficiency. -Carnivorous plants are found in soil lacking necessary nutrients such as nitrogen
-Attractants Animal prey is attracted to carnivorous plants through a variety of attractants that play on animals' senses
-Inescapable Traps
-Digestive Enzymes and Organisms
-Wet Site Inhabitants

(6c)
TABLATE
Type of Germination | Two example each
(1) Hypogeal germination | (i) Groundnut (ii) Wheat

(2)Epigeal germination | (i) bean (ii) tamarind
====================================
====================================

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WAEC GCE FOOD & NUT EXPO

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WAEC-GCE PHYSICS PRACTICAL

*PHYSICS PRACTICAL *

1bii Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

===========================*

2bii resonance is a phenomenon that only occurs when the frequency at which a force is periodically applied is equal or nearly equal to one of the natural frequencies of the system on which it acts.

(3)
TABULATE
i:1,2,3,4,5
Ri(ohm):2.0,4.0,6.0,8.0,10.0
OP(l)(cm):3.70,4.30,5.00,5.40,5.70
xi(cm):18.50,21.50,25.00,27.00,28.50
x^-1:0.054,0.047,0.040,0.037,0.035
R^-1:0.500,0.250,0.167,0.125,0.100
OR THIS TABLE

(3)
(i)|Ri |OP(cm)|xi(cm)|X-¹|R-¹
1 |2.0| 3.70|18.50|0.054|0.500
2 |4.0| 4.30|21.50|0.047|0.250
3 |6.0| 5.00|25.00|0.040|0.167
4 |8.0| 5.40|27.00|0.037|0.125
5 |10.0|5.70|28.50|0.035|0.100
DRAW THE GRAPH of x^-1 against R^-1
(3bi)
- Hyper accuracy
- No errors in readings associated with the use of a pointer in a voltmeter

(3bii)
E1=E2
L1=L2
E2L1=E1L2
where E1=IV
E2=?
L1=50cm
L2=72cm
50E2=72
E2=72/50
E2=1.44v

(3iv) Slope, s= Δx^-1/ΔR^-1 =(50-30)*10^-3/0.29-0.04

= 20*10^-3/0.25 = 0.02/0.25
=0.08

Intercept, c = 26.5*10^-3 = 0.0265

(3vi) K2 =1/c = 1/0.0265 =37.74
K2 = 5/c = 0.08/0.0265
= 3.02

(3viii)
- I would ensure tight connection
- I would ensure clean terminals

*===========================*

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WAEC GCE BIOLOGY PRACTICAL

*2019 WAEC GCE 2nd series*

*BIOLOGY ALTERNATIVE TO PRACTICAL*

plz note!!!!! 
Www.exambond.com provides multiple solutions for it candidates to avoid copied work which can result to F9
Use any of d solutions in our website all are correct. 
Thank u! 

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

(1ai)
X - Eating
Y - Blowing
Z - Drinking

(1aii)

X
Biological System: Digestive system
Organs: Mouth, Tongue, Oesophagus

Y
Biological system: Expiratory system
Organs: Lungs, Nostrils, Mouth

(1aiii)
(i) Digestive system
(ii) Transport system
(iii) Excretory system
(iv) Muscular system

(1b) 
(i) It helps in excretion of unwanted materials
(ii) It forms saliva and mucus which helps to digest our food and keeps the mouth, nose, and eyes moist.
(iii) It delivers oxygen throughout the body
(iv) It boosts skin health and beauty by preventing it from with dehydration. 

(1c)
Bread - increased weight
Beans - intestinal discomfort
Vegetable - indigestion
Orange- Diarrhea
Water - hyponatremia 
Butter - obesity
==================================== 
(2a)
I - Queen 
II -Soldier 
III - Male (king) 
IV - Worker 
V - Nasute 

(2aii) 
I - Lay eggs and produce the young 
II - Defend the territory 
III - Mate with the queen 
IV - Search for foods and feed the colony 
V - Clean the territory or the colony 

(2aiii) 
I - Queen : possession of eggs
II - Possession of power mandible 
V - Possession of strongly built walking legs

(2bi)
Social behavior adaptation 

(2bii)
Works or duties are shared among the castes 

(2biii)
Bees 

(2c)
- Cause decomposition of materials eg wood 
- Serves as food 
- Promotes nutrients availability in the soil

(2d)
Tabular Form;
Under I
(i)it has small head
(ii) the abdomen is large and 
(iii)it has no walking legs 

Under II
(i)it has big head
(ii)the abdomen is small
(iii)it has walking legs
=====================================

(4ai)
Pollination 

(4aii)
I. Self pollination 
II. Self pollination
III. cross pollination 

(4aiii)
I. Transfer of pollen grain from the anther of one flower for the stigma of the same flower 
II. Transfer of pollen grains from the anther of one flower to the stigma of another flower on the same plant 
III. Transfer of pollen grains from the anther of a flower to the stigma of another flower on a different plant of the species

(4bi)
(i) Sexual reproduction

(4bii)
(i) Flowers have reproductive organs
(ii) It involves the production of gametes 

(4c)
(i) Produces healthier seeds
(ii) Plants produced from III are more likely to survive changes in environmental conditions
(iii) It leads to greater variations among species and a faster rate of evolution

(4d)
(i)butterfly (insect)
(ii)birds (aves)
(iii)man (mammals) 
(iv)bat

(4e)
It will lead the formation of a new hybrid 

(4f)
(i)the pollens are rough and sticky 
(ii)the stigma is flat with sticky surface to recures the pollens 
(iii)the way the petals are arranged 
(iv)maturation of stamens and stigmas 

(4g)
(i)the plants have large conscious petals and sepal 
(ii)the flower are brightly colored 
(iii)the flower possess scent 
(iv)the flower have nectar.

(4gii)
(i)bees
(ii)butterflies 

(4h)
(i)androecium
(ii)gynoecium
(iii)stigma
=====================================
Completed

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

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<

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WAEC GCE GEOGRAPHY ESSAY & OBJ EXPO

              *Geography  OBJ *
====================================
==================================== 
 OBJ:
01-10: CBDDCCAACC
11-20: DBBDAACBDC
21-30: CAADCDDBBA
31-40: DDAABACBDB
41-50: BACABBBCAA
====================================
====================================
✅✅✅✅✍✍✍✍✍
1a)  raw materials
2) heavy goods such as cement should be located close to their source to reduce costs of transport 
3) lack of transport system for the supply of Raw materials 
ii)markets 
1) those industries should be located close or near to their markets 
2) there should be ready market for the product of any any industry 
3) bulky goods and perishable goods should be located near their markets
• Rainway transportation can carry  large number of passengers and large and heavy loads to long distances. || Roadway transportation cannot. 
• Railways are convenient for long distance travelling || Roads are more useful for short distances both for passengers and goods.
3b
(3c)
• Accidents/vandalism/uprooting of the railway line causes great
• Tropical storm waters at times wash away vital sections of the railway lines thereby disrupting transport/causes accidents.
• Fuelling/maintenance of railway stations and other related overhead costs are high thus reducing profit margins.
(5a)
(5aii)
(5b)
(5c)
(6b)
(6c)
7b) 

2019 WAEC GCE GEOGRAPHY ANSWERS 
==================================== 
Section A:- answer 2 questions
                 
i) pershiable goods like fruits ,vegetables should be located near their raw materials






==================================== 

(3a)
• Rail transportation is not best for for transporting perishable commodities || Road transportation provide better services for transportation of perishable goods.



I. Expansion of road network to rural areas
II. Improvement on the efficiency of the rail network
III. Improvement on the air transport facilities
IV. Sourcing of necessary funds

• Construction of railways requires large amounts of capital that most countries lack, either to extend or maintain the existing lines.

losses/delays in transportation.


==================================== 

Section B:- answer 2 questions 

Local craft industry;  this encompasses goods that are handmade by artisans or those skilled in a particular trade. In other words Small businesses engaged in the craft trade include everything from art galleries to handmade textiles to culinary products. 

(i)Craft Beer
(ii)Fashion
(iii)Textiles
(iv)Traditional Clothing

(i)limited space in used as workshop 
(ii)small labour force made up of mainly the family members 
(iii)smal I quantities of articles are produced which are sold in local markets 
(iv)many of the articles produced depend on equipments which are not electrically powered 

(i)production of local raw materials, they are occupied by whole families, villages, residents of urban neighborhoods
(ii)Production of textile . In the north (the main center of weaving - Kano) weavers-house produces colorful fabrics on self-made machines.
(iii)Production Traditional Clothing which  Yoruba, Igbo and other tribes engaged in wood carving. Skillful masters carve masks, statuettes; decorate the carving of doors, chairs, drums, etc.
====================================
(6a) diagram 

(i)presence of debris
(ii)the volume of the rivers changes
(iii)seasonality
(iv)Rapids and cataracts

(i)site for grazing
(ii)cultivation purpose
(iii)settlement
==================================== 
7a) i) Precipitation
ii) Humidity
iii) Atmospheric pressure
iv) Cloudiness
v) Wind
vi) Solar radiation

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