Biology WAEC Questions and Answers 2023

The West African Examination Council (WAEC) Has Scheduled The Biology WAEC Questions and Answers 2023 Paper To Kick Of on Today 7th June, 2023.

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WAEC Biology 2023 Paper is Categorized in to 2 parts:

WAEC Biology Theory 2023
WAEC Biology Objective 2023

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Biology WAEC Questions and Answers 2023 — WAEC Biology theory questions 2023

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WAEC Biology Expo 2023

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Waec Biology Theory Answers 2023

(1a)
Classification of living things is the process of organizing and categorizing organisms into hierarchical groups based on their similarities and evolutionary relationships. It involves grouping organisms into various levels of classification, from broad categories to more specific ones, to facilitate the study and understanding of biodiversity.

(1bi)
FUNGI:
(i) They are used in the decomposition of organic matter
(ii) They form symbiotic relationships with plants
(iii) They are used to combat plant diseases
(iv) They are used in the production of enzymes

(1bii)
PLANTS:
(i) They serve as primary source of food for humans and animals
(ii) They provide raw materials for farming
(iii) They are applied in medicinal and pharmaceutical industry
(iv) They contribute to soil stabilization.

(1c)
[TABULATE]

=PHYLA OF KINGDOM ANIMALIA=
(i) Phylum Chordata
(ii) Phylum Arthropoda
(iii) Phylum Mollusca
(iv) Phylum Porifera

=EXAMPLES=
(i) Homo sapiens
(ii) Apis mellifera
(iii) Octopus vulgaris
(iv) Spongilla lacustris

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WAEC BIOLOGY ANSWER PAGE 2023

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WAEC BIOLOGY OBJ ANSWERS

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WAEC BIOLOGY THEORY ANSWERS 2023

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(2a)

[FILL IN THE TABLE WITH THIS]

IRON:

Function:

(PICK ANY ONE)

-Chlorophyll formation

-Electron transport in photosynthesis

-Enzyme activation

-Nitrogen fixation

Effects of deficiency in plants:

(PICK ANY ONE)

-Chlorosis (yellowing of leaves)

-Stunted growth

-Reduced fruit and seed production

-Interference with nutrient uptake

MOLYBDENUM:

Function:

(PICK ANY ONE)

-Nitrogen fixation

-Enzymatic reactions

-Iron uptake and utilization

-Seed germination and growth

-Chlorophyll formation

Effects of deficiency in plants:

(PICK ANY ONE)

-Reduced nitrogen fixation

-Chlorosis (yellowing of leaves)

-Impaired sulfur metabolism

-Abnormal phosphorus uptake

-Altered enzyme activity

POTASSIUM

Function:

(PICK ANY ONE)

-Osmotic regulation

-Enzyme activation

-Protein synthesis

Effects of deficiency in plants:

(PICK ANY ONE)

-Stunted growth.

-Leaf chlorosis.

-Weak stems.

-Reduced flower and fruit production.

-Increased susceptibility to diseases and pests.

COPPER

Function:

(PICK ANY ONE)

-It plays a vital role in activating various enzymes within plants

-It helps to facilitate photosynthesis

-It helps facilitate respiration in plants

(PICK ANY ONE)

Effects of deficiency in plants:

-Stunted growth

-Yellowing of leaves

-Death of plant tissue

-Reduced fertility

-Increased susceptibility to diseases

NITROGEN

Function:

(PICK ANY ONE)

-It helps in building proteins

-It is a fundamental constituent of nucleic acids and DNA

-It helps in formation of chlorophyll

-It helps in energy transfer and metabolism

-It is an enzyme co-factor

Effects of deficiency in plants:

(PICK ANY ONE)

-Reduced photosynthesis

-Poor protein synthesis

-Leaf necrosis

-Increased susceptibility to diseases and pests.

-Impaired nutrient transport

(2b)

(PICK ANY THREE)

(i) Fruits and Vegetables

(ii) Grains and Cereals

(iii) Legumes and Pulses

(iv) Nuts and Seeds

(v) Dairy Products

(vi) Meat, Poultry, and Fish

(2ci)

BUCCAL CAVITY:

(PICK ANY TWO)

(i) The buccal cavity is the entry point for food and liquids into the digestive system.

(ii) The buccal cavity is responsible for chewing or masticating food.

(iii) The buccal cavity contains salivary glands that produce saliva.

(iv) The buccal cavity plays a vital role in speech production.

(2cii)

DUODENUM

(PICK ANY TWO)

(i) The duodenum receives partially digested food from the stomach and continues the process of digestion.

(ii) The duodenum is involved in the absorption of nutrients from digested food.

(iii) The duodenum plays a role in regulating the overall process of digestion.

(iv) The duodenum secretes several important hormones that regulate various aspects of digestion.

(2ciii)

STOMACH

(PICK ANY TWO)

(i) One of the primary roles of the stomach is to store food temporarily after it has been ingested.

(ii) The stomach aids in the mechanical digestion of food through muscular contractions known as peristalsis.

(iii) The stomach secretes gastric juices, primarily composed of (HCl) and enzymes such as pepsin, which play a crucial role in chemical digestion.

(iv) The stomach controls the rate at which food is released into the small intestine.

(2d)

Glucose and fructose

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(3a)

I: Saprophytism

II: Commensalism

III: Mutualism

IV: Predation

V: Parasitism

(3b)

(i) B: Prey

(ii) G: Predator

(3c)

B: Rabbit

C: Vultures

D: Lion

E: Remora fish

F: Cleaner shrimp

G: Hyenas

H: Ticks

J: Dogs

(3di)

Mutualism

(3dii)

There is a mutual exchange of resources or protection that enhances the survival of both organisms.

(3ei)

(i) Saprophytic Fungi

(ii) Bacteria

(3eii)

Decomposers

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BIOLOGY INSTRUCTIONS

ANSWER THREE QUESTIONS IN ALL: TWO QUESTIONS FROM SECTION A AND THE COMPULSORY QUESTION IN SECTION B.

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SECTION A

ANSWER TWO QUESTIONS ONLY FROM THIS SECTION.

QUESTION 1

QUESTION 2

QUESTION 3

QUESTION 4

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SECTION B

ANSWER THE QUESTIONS IN THIS SECTION.

QUESTION 5

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