2020/2021 WAEC/NECO Answers: 2021 Waec Gce biology answers



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ID 56

Exam Time: Monday, 8th April, 2019
Catering Craft Practice 2 (Essay)** 9:30 a.m. 10:20a.m.
Catering Craft Practice 1 (Objective)** 10:20 a.m. 11:00 a.m.


++++++++++++++++++++++++

Catering OBJ:

1-10: AAAAACCBCC

11-20: ACDBABAADA

21-30: BCDDBDCCBA

31-40: BCCCAAAACB

+++++++++++++++++




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This is actually the 2018 Waec Gce biology answersAnswers as questions sent to our subscribers on WHATSAPP, if you are looking for 2021 WAEC/NECO Answers midnight before the exam, try contacting us.


(6a) 
(i) Rokert hoot
(ii) Felix Diyardin 
(iii) Mathias Schleidon. 
(iv) Theodor Schwom 

(6b) 
In a tabular form: 
Classes of plants based on life cycle and Two examples

Classes | Examples
(i) Anual | Vegetable, Cotton
(ii) Biennials | Carrot, Ginger
(iii) Perennials | Cocoa/banana


(6c) 
The amniotic fluid help to neutralize the effect of changes of external temperature 

(6d) 
(i) Rhizobium : It helps to fix atmospheric nitrogen directly into the plant. 
(ii) Azotobacter: It can fix atmospheric nitrogen into the soil either aerobically or anaerobically. 
(iii) Blue-green algae: They are mainly auto trophic plants; they can synthesize their own food. 

(6e) 
Draw the diagram



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

(3ai)
Mango trees -> Caterpillars -> chicks of domestic fowls -> Hawks

(3aii) Draw the diagram 

(3bi) Water: 
-Serves as a habitat for organisms. 
-Serves as a source of water for irrigation. 
-Serves as a source of hydroelectric power. 

(ii) Soil: 
-It ensures continuous sources of plant nutrients. 
-It ensures sources of water/reservoir for soil organisms. 
-It ensures sources of raw materials for some industries. 

(iii) Forest:
-It ensures the conservation of trees or forest product. 
-It helps to check erosion. 
-It helps in the preservation of natural spaces.



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


1a)

Skeleton of mammal: this consists of a head at one end of a vertebral column from which extend ribs to support the working organs and four limbs for locomotion. The vertebral column ends in a tail.


1b

i. Exoskeleton eg..

ii. endoskeleton eg. Mammals

iii. Hydrostatic skeleton eg. Soft body animals


(1c)
(Functions of Skeleton)
(Pick 3)


(i)Support:-The rigid framework of the skeleton gives support to the body

(ii)Protection:-The skeleton protects important and delicate organs of the body

(iii)Movement:-The whole skeleton is made up of severely pieces of bones which are jointed and brings about movember

(iv) Respiration:-The skeleton also aids in respiration


1d.




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

(2a)
Vitamins are group of organic compounds which are essential for normal growth and nutrition and are required in small quantities in the diet because they cannot be synthesized by the body.

(2b)
Vitamin: C
One Function: Healing of wounds
One Deficiency: Scurvy
One Source: Citrus Fruits

Vitamin: D
One Function: Strong bones and teeth
One Deficiency: Rickets
One Source: Eggs

Vitamin: B
One Function: Releases energy from carbohydraes 
One Deficiency: Beri-beri
One Source: Yeast

Vitamin: K
One Function: Clotting of blood 
One Deficiency: Failure of blood to clot
One Source: Milk

(2c)
(i) Iron: Assists in nitrate and sulfate reduction and energy production within the plant

(ii) Nitrogen: For rapid growth

(iii) Calcium: It is responsible for holding together the cell walls of plants






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