2020/2021 WAEC/NECO Answers: 2020 wace Health Science @Health Education

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A -Flush toilet
B - Bucket Toilet

A - it is hygienic
B - it is very cheap type of toilet

A=it is very expensive
B=it is not hygienic


(i) Lock your toilet to keep intruders away
(ii) Clean it regularly with detergents, antiseptic toilet cleaners and brushes to scrub away dirt on the surface.



A - Breast feeding
B - Bottle feeding

Breast feeding

A - Breast feeding:
(i) Breast milk helps protect your baby from illness during infancy, particularly tummy bugs and ear infections.
(ii) Breast feeding has lasting benefits for baby's metabolism, reducing the chance of obesity and diabetes, and of allergies like eczema, later.

B - Bottle feeding:
(i) It provides more flexibility in being away from your baby if you have to work, for example.
(ii) Bottle-feeding is easier to delegate when you are tired, allowing you to rest properly and have more energy overall.

Disadvantages of Bottle feeding:
(i) It does not provide the same protection against infections as breast milk
(ii) It is expensive
(iii) Inconvenient while travelling



(I) Ocular lens
(II) Arm
(III) Adjustment knob
(IV) Base
(V) Light source
(VI) Stage clips.

It is used to magnify smaller objects that are not clear scan with naked eye.

(i) In the laboratory.
(ii) Beaures.
(iii) In schools

(i) Medical people.
(ii) Lab technicians


Arm dislocation

I - Splint
II - Strap

(i) It helps in replacing the arm in its normal position
(ii) To avoid further hurt
(iii) To support the shoulder.
(iv) To immobilise the shoulder


(i) Biceps
(ii) Triceps

See the doctor

(i) Burn
(ii) Fractures
(iii) Cut


(i)Smoking cause Premature aging
(ii)Smoking increases the chances of impotence
(iii)smoking lead to Sense of bad smell and taste
(iv)smoking lead to premature death
(v)smoking Increased chance of contacting infections

(i)Stick to Designated Crossing Areas
(ii) Avoid wearing dark clothes at night
(iii) Determining Fault After an Accident
(iv) Adequate knowledge of road signs
(v) Avoid distractions, such as looking at your phone when walking or crossing a street.


(i)microcytic anemia.
(ii)normocytic anemia
(iii)macrocytic anemia.

(1) To maintain the physical, mental and social well-being of workers.
(ii) To prevent the unfavorable effects on health caused by working conditions
(iii) To become familiar to occupational environment of physical and mental needs of workers
(iv) To consider the issues relating to industrial safety, occupational medicine, industrial hygiene etc

(i) Wash your hands with soap and water before eating or handling food and after using the toilet.
(ii) When traveling in areas where tapeworm is more common, wash and cook all fruits and vegetables with safe water before eating.
(iii) Eliminate livestock exposure to tapeworm eggs by properly disposing of animal and human feces.



Artificial pasture refers to an area of land covered with forage grasses and legumes which are deliberately planted by man.

(i) extend the growing season of a pasture
(ii) increase the organic matter content of the soil over time because of grass root systems
(iii) reduce weed encroachment
(iv) reduce erosion
(v) produce higher yields
(vi) improve the palatability

(i) mixed production
(ii) intensive farming systems “landless”
(iii) extensive production system

-Mixed production:
(I) it includes both agriculture and livestock
(ii)it can be either intensive or extensive.
(iii)it used for exploitation of both irrigated or non-irrigated land and they are common in some parts of America, Europe and Asia.

-Intensive farming:
(i) it is mainly used for livestock.
(ii)it is used to breed pigs, chickens, laying hens, cattle and even fish
(iii)they are common in north America, Europe and Asia and in heavy populated areas in general, where the demand for meat and proteins is very high.

-Extensive farming:
(i)it is used on large non-cultivated land where animals can graze freely
(ii)it is use for cattle, to produce meat and milk, sheep and goats.
(iii)It is more common in Central and South America

(i) Glycerol
(ii) fatty acids

(i)Source of Energy
(ii)Vitamin Absorption
(iii)Insulation and Temperature Regulation

(i)Sodium regulates the body's water balance
(ii)sodium maintains normal heart rhythm

(i) Protects Your Eyes From Night Blindness and Age-Related Decline
(ii) Lower Your Risk of Certain Cancers
(iii) Supports a Healthy Immune System


(i)children should consume a range of nutrients from a variety of food types.
(ii)children should drink water regularly
(iii) children should receive health care regularly
(iv)children should take plenty of fruit
(v)balanced intake of carbohydrates, fats, protein and mineral

I=salivary glands


(i)ovaries produce the egg cells
(ii)ovaries produce hormones


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