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WAEC: OFFICIAL WASSCE 2021 TIMETABLE


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WAEC 2021 Biology (Objective & Essay) Question and Answer

WAEC 2021 Biology Expo Answer

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

BIOLOGY THEORY ANSWERS

(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.

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

(2a) Dentition pertains to the development of teeth and their arrangement in the mouth. … The dentition of animals with two successions of teeth (deciduous, permanent) is referred to as diphyodont, while the dentition of animals with only one set of teeth throughout life is monophyodont.

(2b) A tooth consists of enamel, dentin, cementum and pulp tissue. The portion of a tooth exposed to the oral cavity is known as the dental crown, and the portion below the dental crown is known as the tooth root. The dental pulp cavity exists in the center of the tooth, through which the dental pulp, called the nerve, runs. In order to receive an impact on the tooth and to absorb and alleviate the force on the jaw, the surface of the tooth root area (cementum) and the alveolar bone are connected by a fibrous tissue called the periodontal ligament. The tooth is supported by the tissue consisting of the alveolar bone, gums and the periodontal ligament.

(i) Enamel: The hardest bodily tissue covering the surface of the dental crown. It is as hard as crystal (7 on the Mohs scale of mineral hardness).
(ii) Dentin: The tissue that forms the tooth from the dental crown to the tooth root, situated inside the enamel and cementum. It is softer than the enamel. A small tube filled with tissue fluid, called the dentinal tubule, runs inside the dentin.
(iii) Cementum: The tissue covering the surface of the tooth root. It connects the alveolar bone with the tooth by the periodontal ligament. Its hardness is similar to bone.
(iv) Dental pulp: The tissue is called the nerve. Blood vessels and the lymph vessels, as well as nerve fibers, are located in the dental pulp, supplying nutrients to the dentin.

(2c)
(i) cellulose
(ii) Starch
(iii) Sugar

(2d)

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

(3a)
-DECOMPOSER-
(i) Bacteria
(ii) Mushroom
(iii) Mucor

-PRODUCER-
(i) Water lettuce
(ii) Water leaf
(iii) Algae Lema

-CONSUMER-
(i) Dog
(ii) Tadpole
(iii) Cat

(3bi)
(i) Co2
(ii) Water
(iii) Energy
(iv) Plant nutrients

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

(3c)
(i) Non biodegradable items
(ii) Metals
(iii) Bones
==================

(4a)
TABULATE PLS

=ANIMAL=
(i) Peacock
(ii) Horse
(iii) Python
(iv) Lion
(v) Elephant

=ONE BODY PARTS THAT MAKES ANIMAL ENDANGERED BY HUMAN ACTIVITIES=
(i) Feathers
(ii) Tail
(iii) Skin
(iv) Skin
(v) Tusk

(4b)
(i) Overgrazing; The activity of Overgrazing leads to the extraction of grasses which invariably leads to erosion-wasting away of the soil surface

(ii) Poaching; Poaching which is damage by the soil and grass also leads to gulley erosion

(4c)
(i)The establishment of forestry departments and establishment of environment Protection agency to improve the situation.

(ii)the role of creation of Parks and Games Reserves/any correctly named example.

(iii)the role of conservation education carried out through tree planting/ campaigns against bush burning/ tree.

(iv)the role of preserve/maintain plants and animals in their natural environment
========================

5.g. Biofuel, any fuel that is derived from biomass—that is, plant or algae material or animal waste. Since such feedstock material can be replenished readily, biofuel is considered to be a source of renewable energy, unlike fossil fuels such as petroleum, coal, and natural gas.

(5g) ii.Biodiesel
Ethanol
Wood
Biogas

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

Biology is a core subject for any science student taking 2021 WAEC in senior secondary school. Any science student that failed in Biology will not be able to use his/her own certificate to proceed further in pursuing another level certificate. Therefore, you need to subscribe in order to pass this paper so that your effort of 6 years in secondary school will not be in vain.

WAEC 2021 Biology Area Of Concentration

Concept of Living
Classification
Organization of life
Forms in which living cells exist:
(a) Cell structure and functions of cell components.
The Cell and its environment:
Properties and functions of the living cell
(a) Nutrition
(b) Cellular respiration
(c) Excretion
(d) Growth
(g) Reproduction: Types of reproduction.
(a) Tissues and supporting systems:
(b) Different types of supporting tissues in plants.
8. Transport System:
9. Respiratory System:
11. Regulation of Internal Environment (Homeostasis)
12. Hormonal Coordination
14. Sense Organs: Structure and function of the
15 (a) Reproductive system of mammals
B. Plant and Animal Nutrition
1. Plant Nutrition
2. Animal Nutrition
C. Basic Ecological Concepts
1. Ecosystem:
2. Ecological factors:
3. Simple Measurement of Ecological Factors.
4. Food webs and trophic levels
6. Ecological Management:
7. Ecology of population
8. Microorganisms:
D. Conservation of Natural Resources:
E. Variation in Population
1. Morphological variations in the physical appearance of individuals
2. Physiological Variations
F. Biology of Heredity (Genetics)
1. Genetic terminologies
2. Transmission and expression of characteristics in organisms.
3. Chromosomes: The basis of heredity
4. Probability in genetics (Hybrid formation).
5. Linkage, sex determination and sex linked characters.
6. Application of the principles of heredity in:
G. Adaptation for survival and Evolution.
1. Behavioural Adaptations in Social Animals.
2. Evolution.
=====================================

The 2021 WAEC Biology (Obj & Essay) Solution Expo Questions and Answers have indeed been long expected and much anticipated. While the official body to conduct the 2021 Senior School Certificate Examination which is the West African Examination Council was originally slated for May/June, but due to some reasons best known to the body, it is now scheduled for August/September.

The following is the examination schedule.

Friday, 10th September

WAEC (Biology) Answer Obj & Essay – Expo Runz


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

 

Dear candidates, you are welcome to the May/June 2021 Expo Runz Real and Verified WAEC Biology (Obj and Essay/Theory) Questions and Answers.

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