Home | WAEC | NECO | NABTEB | UTME JAMB | WAEC GCE | NECO GCE| NABTEB GCE | JUPEB | JOINT EXAM | SCHOOL NEWS

WAEC: OFFICIAL WASSCE 2021 TIMETABLE


WAEC: How TO GET 2021 WAEC Question & Anwer Before Exam Start

WAEC 2019 Biology Obj and Essay Answer – May/June Expo

100% Correct and Real WAEC 2019 Biology Answer Obj and Essay– May/June Expo.

Biology OBJ
1 – 10: CBABBACABC
11 – 20: CDBCACDDBB
21 – 30: DCCDDBCADB
31 – 40: DBADDAACDC
41 – 50: CCADDCAADC

THIS IS TO SHOW THE DOUBTING THOMAS THAT EXPOSPY.COM IS THE BEST, WE HAVE SENT COMPLETE ANSWER TO OUR SUBSCRIBERS BEFORE EXAM START THIS MORNING DO ENSURE YOU SUBSCRIBE FOR THE REMAINING SUBJECTS EARLIER BECAUSE FREE ANSWER WILL NOT BE AVAILABLE OR LATE

GOODLUCK 

================
Biology Theory

YOU ARE TO ANSWER THREE QUESTIONS ONLY

Two questions from SECTION A and any one from SECTION B OR C

(1ai)
TABULATE:
ORAGNISM |RESPIRATORY SURFACE 
Tadpole |Skin
Cockroach|Trachea
Domestic fowl|Lungs 
Talinum |Stomata
Earthworm|Skin
Amoeba |Cell membrane 

(1b) 
(i) Large surface area
(ii) Thin respiratory surface 
(iii) Moist surface 
(iv) Efficient transport system. 
(v) Permeability

(1c)
Draw
==========================

(2a)
(i) Meat type A and meat type D
(ii) they contain the lowest fat content 
(2bi)
(i)Meat type C and meat type D
(ii)
– Proteins gives energy 
– Strengthens muscle 
(2ci)
(i) A, C & D
(ii) A person deficient in protein suffers kwashiokor. Hence a diet with high content in protein is needed.
(2di)
Meat type D
ii) Meat type F
(2e)
carbohydrates
(2f)
– For energy and heat to keep the body warm 
– Are used as insulators to nerves and cell membranes 
– Formation of cell membranes
(2g)
Drop the meat on a white paper observe the meat against a source of light, the far part becomes more translucent
======================

3a)

3b)
-They have strong suckers and hooks
-They have large Surface area for absorption of nutrients
-They have thin and flattened shape

3bii)
-They cause blood loss
-They Cause diarr hoea 
-They cause severe loss of weight

3ci)
Saprophytes are mainly non-green plants which do not have chloroplasts and therefore cannot manufacture their own food

3cii) 
-Rhizopus
-Mushroom
-mucor
-Agaricus
-Yeast
======================

(6ai)
The enormous energy of lightning breaks nitrogen molecules and enables their atoms to combine with oxygen in the air forming nitrogen oxides. These dissolve in rain, forming nitrates, that are carried to the earth.
====================
5a) secondary’characteristic to 
MALES
– Broaden of chest
– Public hairs
– Development of adam”s apple

FEMALES
– Public hairs
– Onset of menstration
– Broaden of hips

5c) Summary of Differences Between DNA and RNA. DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. … DNA is responsible for storing and transferring genetic information while RNA directly codes for amino acids and as acts as a messenger between DNA and ribosomes to make proteins.
==========================

(6aii)
This organism oxidizes ammonia into nitrite as a metabolic process. Nitrosomonas are useful in bioremediation. They are important in the nitrogen cycle by increasing the availability of nitrogen to plants while limiting carbon dioxide fixation.

(6aiii)
Azotobacter helps to synthesizes some biologically active substances, including some phytohormones such as auxins, thereby stimulating plant growth.

(6b)
(i) Malphigan tubule
(ii) Nephridium 

(6c) 
(i) Hepatitis: This is a liver disease defined as inflammation of the liver. It may occur as a result of viral infection or toxic substances like poisons or drugs. This disease makes the liver unable to perform it’s functions properly. 

(ii) Kidney stones: This is caused by diseased growth in the kidneys within the tubules. This growth narrows rye tubules preventing free flow of urine. It most causes complete blockage of. Urine results. 

(6di)
(i) It makes the system insensitive. 
(ii) It Mars the protective role of the system. 
(iii) Temperature will be poorly regulated.

(6dii)
(i)Cornified layer. 
(ii)Granular layer. 
(iii)Malphigean layer.

(6ei) 
Metamorphosis is the series of gradual changes of forms and shape of insect from the fertilized egg to adult. 

(6eii) 
Grasshopper – Incomplete 
Cockroach – Incomplete 
Butterfly – complete 
Mosquito – complete 
Housefly – complete

EXPOSPY.COM IS THE BEST. DO ENSURE YOU SUBSCRIBE FOR THE REMAINING SUBJECTS EARLIER.

GOODLUCK 

Avoid Scammers, Always subscribe to Expospy.com to get Verified WAEC Biology Answer. 


GOODLUCK!!! 
Incoming Searches: 2019/2019 Biology Essay/Obj Expo Questions and Answers, 2019/2019 WAEC Biology Essay/Obj Questions And Answers Expo, 2019/2019 WAEC Real/Confirmed Biology Essay/Obj Expo/Runz Questions/Answers, 2019/2019 WAEC Ssce Biology Expo, 2019/2019 WAEC/Wassce Real Biology Essay/Theory/Obj Runz Questions and Answers, correct WAEC Biology answer 2019, free WAEC 2019 answer Biology, Questions And Answers., real Biology answer WAEC 2019Biology answer 2019, Verified 2019/2019 WAEC Biology Essay/Obj Questions/AnswersExpo/Runz, verified WAEC Biology answer 2019, Verified/sure 2019/2019 WAEC Ssce Nov/Dece BiologyTheory/Obj Question And Answers Expo/Runz, WAEC 2019 Biology answer, WAEC 2019 Biology expo, WAEC 2019/2019 Biology Questions and Answers Runz/Expo, WAEC Biology answer 2019, WAEC Biology essay 2019, WAEC Biology expo 2019, WAEC Biology obj 2019, WAEC Biology question 2019.

Add a Comment

Your email address will not be published. Required fields are marked *