WAEC General Mathematics 2021 Answers

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Waec Mathematics 2021 Answers

WAEC Mathematics QUESTIONS 2021 👇

 

OUR PASTED WAEC ANSWERS👇

Agricultural Science 3 (Practical) 9:30am. –11:00 am.(1stSet)
Agricultural Science 3 (Practical) 11:30am. – 1:00pm.(2ndSet)
Agricultural Science 3 (Alternative to Practical Work) 9:30am. –11:00am.


(4)
(i)Farmers
(ii)Retailers
(iii)Wholesalers
(iv)Consumers

(4b)
-Pour the raw milk into a steel pot
-slowly heat the milk to about 63°c and maintain it for about 30 minutes
-remove the pot and place it in a bowl filled with ice water. Stir until the temperature drops
-stor in a refrigerator.

(4c)
(i)Vitamin D
(ii)Calcium
(iii)Protein

(4d)
(i)Tightening of the skin
(ii)Loss of weight
(iii)Low production of milk
(iv)Dehydration
(v)Stress


(3a)
(i)Specimen H: Centrosema pubescens
(ii)Specimen I: Pennisetum purpureum Schumach
(iii)Specimen J: Pueraria phaseoloides

(3b)
(i)Specimen H: is propagated by seed
(ii)Specimen I: is propagated vegetatively through stem cuttings
(iii)Specimen J: is propagated by seeds

(3c)
(PICK ANY FIVE)
(i) It is vigorous and aggressive growing legume
(ii)It is creeping and twining plants
(iii)it is palatable and highly nutritious to ruminants
(iv)It is leafy and perennial
(v)It is shade-tolerant and drought resistant legumes
(vi)steam and leaves are hairless
(vii)It is highly modulated and does well in combination with Guinea grass

(3d)
(i)It is used for traditional animal feed,
(ii)It is used for pest management
(iii)It is used for improving soil fertility
(iv)It is used for protecting arid land from soil.


(2a)
SPECIMEN E:
(i)It is Expensive
(ii)Fertilizer is corrosive to touch
(iii)Vegetative growth in plants is stimulated thereby reducing erosion
(iv)It is readily soluble in water thus are rapidly absorbed by plants
(v)Application requires special guidelines
(vi)Does not add humus

SPECIMEN G:
(I)It is Cheap
(ii)It is mild to touch
(iii)Certain diseases can be transmitted to plants
(iv)Manure is not readily soluble in water thus it is absorbed by plants slowly
(v)Application does not require any special guidline
(vi)Adds humus to soil.

(2bi)
Nitrogen

(2bii)
(i)Ammonium Nitrate
(ii)Ammonium Sulphate
(iii)Sodium Nitrate

(2c)
(i)Excessive use causes plant death
(ii)It needs to be used in advances as it takes time to come into effect
(iii)It causes acidity
(iv)Mixing and preparation can lead to pollution
(v)It is Expensive to buy


(1a)
Shears are an enlarged pair of scissors or scissors-like in shape. They possess two long metal blades and two handles which may be wooden,metal,rubber or plastic . The bladder are sharpened at one edge and are connected to the pivot by bolt and nut.

(1b)
SPECIMEN A
(Pick Any Two)
(i)shears are used for pruning operations
(ii)They are also used for trimming flowers
(iii)They can be used for cutting flowers

SPECIMEN B
(Pick any Two)
(i) It is used for pruning shrubs ,ornamental plants and for weeding
(ii) It is used for trimming hedges or shrubs
(iii)It is used for cutting bud,wood or scion and the root stock.

(1c)
SPECIMEN A:
(Pick any three)
(i)store in a cool,dry places
(ii)sharpen the blades properly
(iii)keep away from rain to prevent rusting
(iv)Clean or wash after use

SPECIMEN C:
(Pick Any Three)
(i) store in a dry and cool place
(ii)Keep away from rain and termite attack on wooden handles
(iii)sharpen the blade regularly

(1d)
(Pick any two)
(i)Shovel
(ii)Garden folk
(iii) Hand towel
(iv) Hoes


AGRIC SCIENCE PRACTICAL SPECIMEN

Specimen A: Shears
Specimen B: Secateurs
Specimen C: Spade
Specimen D: Cutlass
Specimen E: Urea fertilizer (labelled)
Specimen F: Wood ash (labelled)
Specimen G: Poultry manure (labelled)
Specimen H: Centrosema
Specimen I: Elephant grass
Specimen J: Tropical kudzu
Specimen K: Guinea grass
Specimen L: Chicken egg
Specimen M: Raw milk (labelled)
Specimen N: Water (labelled)
Specimen O: Poultry feathers.


Answers Loading…




 

Animal Husbandry (AlternativeB) 2 (Essay) 2:00pm.–4:00pm.
Animal Husbandry (AlternativeB) 1 (Objective) 4:00pm.–4:40pm.


ANIMAL HUSBANDRY:
1-10: CAAADCDBBA
11-20: BACBADDBAC
21-30: ABBCCBDABD
31-40: ABCCDABBBD


(6ai)
Brooding is defined as the management of chicks which involves the natural or artificial provision of heat and other necessary care to chicks until they are about six weeks old

(6aii)
(i) Proper sanitation
(ii) Ensuring of adequate light
(iii) Adequate feeding
(iv) Medication and vaccination

(6b)
(i) Blood loss which, if substantial, can lead to anaemia and death.
(ii) It causes diarrhoea which, if severe, can lead also to death.
(iii) It reduces appetite of farm animals, resulting in debilitated animals that are more susceptible to other diseases.
(iv) Internal parasites often interfere with digestion and assimilation of food, causing poor growth.

(6c)
(i) Avoid grazing high risk pastures
(ii) Avoid co-grazing
(iii) Regular faecal samples should be taken from sheep to determine the liver fluke burden on the farm

(6di)
Artificial insemination is the process of collecting sperm cells from a male animal and manually depositing them into the reproductive tract of a female.

(6dii)
(i) There is no need of maintenance of breeding bull for a herd; hence the cost of maintenance of breeding bull is saved.
(ii) It prevents the spread of certain diseases and sterility due to genital diseases
(iii) It increases the rate of conception
(iv) It helps in maintaining the accurate breeding records.


(5ai)
Scalding: This is the process of treating carcasses with hot water or steam to loosen the hair or feather in the follicle to aid their removal.

(5aii)
Singeing: This is a major process by which fur on the skin of the animals are removed making the hide of the carcass ready for consumption and also evoke flavors in the meat which are acceptable to the consumer.

(5aiii)
Evisceration: This is a method of autotomy involving the removal of internal organs used by animals as a defensive strategy.

(5b)
[Pick Any FOUR] (i) Media/advertiser
(ii) Exporters
(iii) Wholesaler
(iv) Co-operative society
(v) Market boards
(vi) Retailers

(5c)
[Pick Any Five] (i)Researching function
(ii)Promotion function
(iii)Production function
(iv)product development and management function
(v)Distribution function
(vi)Risk bearing function

(5d)
(i) Dung stage
(ii) Pasture stage
(iii) Host stage

(5e)
[pick any two] (i)Selection
(ii)Introduction
(iii)Breeding


(1a)
(i)Keep provision for the entrance of fresh air.
(ii)Provide clean, fresh water for the birds at least twice daily.
(iii)Adjust the temperature as per the requirement of the chicks.
(iv)Daily inspect the condition of birds and their faces for any sort of abnormality.
(v)Keep the brooder in such a place that cold wind and rain does not get in.

(1bi)
Deworming is the getting rid or expelling of parasitic worms within the birds’ system by giving the birds anthelmintic drugs like dewormer.

(ii)Culling is the identification and removal of birds that do not possess the qualities for giving enough benefit in return for their culture.

(iii)Debeaking is the partial removal of the beak of poultry to avoid cannibalism.

(iv)Delousing is defined as the use of any Physical or chemical means to get rid of lice.

(1c)
(i)Drooped wings.
(ii)Feather loss (unless birds are going through a natural moult).
(iii)Abnormal droppings.
(iv)Dull and/or closed eyes


(4a)
(i) It serves as a source of income
(ii) It generates high-quality food products such as meat, egg, milk, cheese
(iii) It generates employment opportunities
(iv) It can help a country to generate foreign exchange earnings through the export of livestock products.

(4bi)
[Pick Any SIX] (i) Mouth
(ii) Vestibule
(iii) Oesophagus
(iv) Stomach
(v) Small intestine
(vi) Caecum
(vii) Large intestine
(viii) Anus

(4bii)
[Pick Any TWO] (i) It helps in absorption of food eg: Small intestine
(ii) It helps in secretion of digestive enzymes
(iii) Stomach as part of alimentary canal secretes gastric juice containing hydrochloric acid which destroys harmful bacteria in the stomach.

(4ci)
[Pick Any FOUR] (i) Liver helps with bile production
(ii) Excretion of bilirubin, cholesterol and hormones
(iii) Metabolism of fats, proteins, and carbohydrates.
(iv) It helps in enzyme activation.
(vi) Storage of glycogen, vitamins, and minerals.
(vii) Synthesis of plasma proteins, such as albumin, and clotting factors
(viii) Blood detoxification and purification

(4cii)
(i) Liver fluke
(ii) Schistosoma

(4d)
[Piick Any TWO] (i) Goat has four-compartment stomach while rabbits have a monogastric digestive system
(ii) Goat posseses reticulum while it is absence in a rabbit
(iii) Goat has rumen while rabbit does not.


ANSWERS LOADING….












 

Animal Husbandary (AlternativeB)3(Practical) – 9:30am.– 11:00am.(1stSet)
Animal Husbandry (AlternativeB)3(Practical) – 11:30am. – 1:00pm.(2ndSet)


NOW SOLVING AND TYPING..

(3ai)
(i)It can be used in giving water to livestocks
(ii)It can be used in giving feed to livestocks
(iii)It keeps animal feed away from dirts.
(iv)It can be used in packing remains of livestocks
(v)It keeps animal water away from being contaminated

(3aii)
(i)it keeps feeds from contamination
(ii)It keeps water from contamination

(3aiii)
(i)It does not enable the livestocks to feed conveniently
(ii)It stress the livestocks while drinking

(3b)
This is used for measuring and monitoring temperature while brooding chicks

(3ci)
(i)It is used for easy identification of livestock
(ii)It is also used to identify year of birth

(3cii)
(i)cattle
(ii)Pig
(iii)Rabbit



(1a)
Specimen A is gotten after all the pods on a groundnut have been removed. After this, the remaining parts is then dried.

(1aii)
(i) Specimen A brings about fattening in farm animals.
(ii) It aids the growth and development of farm animals.
(iii) It boost the immune system of farm animals.

(1bi)
(i) Sowing seed.
(ii) Vegetative propagation.

(1bii)
(i) Hay making.
(ii) Ensiling.

(1c)
(i) It can be used for marking animals.
(ii) It can be used for cutting hay for livestock.
(iii) It is also used in killing some farm animals.
(iv) It can be used for castrating farm animals.


(2ai)
(i) Shell
(ii) Foot

(2aii)
(i) It serve as food
(ii) It serve as a source of protein
(iii) It requires low start-up capital in rearing
(iv) It is rich in therapeutic contents

(2aiii)
(i) Beetles
(ii) Mites
(iii) Nematodes

(2bii)
(i) It serve as food for some farm animals
(ii) It can be used as bedding material
(iii) It can be used in farm animals building

(2bii)
(i) It is difficult to control when grown
(ii) It can cause injury for farm animals


(4)


(1)


ANIMAL HUSBANDRY SPECIMEN:

A: Dry groundnut haulm

B: Fresh Guinea grass

C: kitchen Knife

D: Rat(preserved)

E: Live land snail

F: Bamboo stick

G: water in a bowl(labelled)

H: Plastic bucket with cover

I: Mercury-in-glass thermometer

J: Ear tag

K: Head of cock(Fresh)

L: pair of scissors


Answers Loading….









 

Maths 2 (Essay) 9:30am. –11:10am.
Maths 1 (Objective) 11:10am. –12:00noon.


PLEASE USE THIS. MORE ACCURATE

Maths OBJ:
1-10: CBABDABCDB
11-20: CDDACBBAAB
21-31: CBCCCBABAD
31-40: BCDCDDBDDA
41-50: BDADCABCDD


NOTE: You are to answer 3 questions in all. Two from section A and then one question in section B.
-Section A contains nos 1-4
-Section B has only number 6 (for Naija)


(1)

(1a)
(i) Plasma
(ii) Red blood cell
(iii) White blood cell
(iv) Platelets

(1b)
(i) Plasma
(ii) White blood cells
(iii) Red blood cells
(iv) Platelets
(v) Red blood cells
(vi) Platelets
(vii) White blood cells

(1c)
(i) Amino acids
(ii) Glucose
(iii) Mineral salts and water

(1d)
(i) Anemia
(ii) Haemophilia
(iii) Blood clots
(iv) Leukemia

(1e) Disease of the blood is dangerous because it can lead to other issues and consequently death.


(2)

(2a)
Dentition refers to the development of teeth and their arrangement in the mouth of animals

(2b)
The tooth consists of three main portions namely; The crown, neck and root. The crown is above the gum covered with a white hard substance called enamel. The short neck is covered with gum. The root is embedded in the jaw bone by a substance called cement or cementum

(2c)
(i)Proteins
(ii)Fats
(iii)cellulose

(2d)


(3)

(3a)
IN A TABULA FORM

DECOMPOSER:
-Bacteria
-Mushroom
-Mucor

PRODUCER:
-Water lettuce
-Water leaf
-Algae Lema

CONSUMER:
-Dog
-Tadpole
-Cat

(3bi)
(i)CO₂
(ii)Water
(iii)Energy
(iv)Plant Nutrients

(3bii)
(i)Decomposer prevent accumulation of dead organisms
(ii)Increase soil fertility
(iii)Helps to break down biodegradable items

(3c)
(i)Non-biodegradable item
(ii)Metals
(iii)Bones


(6)

(6a)
IN A TABULA FORM

PROCESS:
(i)Combustion
(ii)Precipitation
(iii)Lighting

NUTRIENT CYCLE:
(i)Carbon
(ii)Water
(iii)Nitrogen

OTHER PROCESSES:
(i)Decay, decomposition, respiration
(ii)Evaporation, transpiration, respiration
(iii)Artificial fertilizers, Nitrogen fixing, denitrification

(6bi)
Irritability is the ability of living things to respond to changes in external and internal stimuli such as light

(6bii)
TYPES OF RESPONSE
(i)Positive phototaxis
(ii)Thigmotropism
(iii)Negative phototaxis
(iv)Chemtropism (positive chemotaxis)
(v)Nastic
(vi)Phototropism

(6ci)
TERRITORIALITY:
(i) Birds
(ii) Bees
(iii) Cougar

(6cii)
SEASONAL MIGRATION:
(i) Dragon flies
(ii) Butterflies
(iii) Northern elephant

(6ciii)
DISPLAY:
(i) Lizard
(ii) Poultry birds
(iii) Humans


Answers Loading…









 

Chemistry 3 (Practical) (Alternative A) 9:30 am. – 11:30 am. (1stSet)
Chemistry 3 (Practical) (Alternative A) 12:00noon. –2:00pm.(2ndSet)


PLEASE TAKE NOTE OF YOUR SCHOOL END POINT.
Use your endpoint in place of mine and calculate accordingly…
SOLVING AND UPLOADING…


(3)

(3a)
(i)It has no effect on the new titre value
(ii)The number of moles at the base remains the same – as the volume increases, the concentration falls

(3b)
(i)
No reaction. Copper cannot displace Zinc from its salt.
(ii)It absorbs a large amount of water from the atmosphere and turns into solution.
(iii)Solution turns pink.

(3c)
Zinc, being amphoteric, reacts with alkalis to form a zincate(II) which is soluble.
I.e Zinc²†(aq) + 2NaOH(aq) —> Zn(OH)2(s) + 2Na†(aq)
Zn(OH)2(s) + 2NaOH(aq) —> Na2Zn(OH)4(aq)

Excess                                     Soluble


(2a)
Test: C + 10cm³ of distilled water, then stir and filtered

Observation: Blue precipitate was observed, resulting to light blue filtrate and pale blue residue is formed.

Inference: C is a mixture of soluble and insoluble salt.

(2b)


(1)



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