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2024 WAEC GCE Biology OBJ/Essay Questions and Answers Expo/Runs

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2024 WAEC GCE Biology OBJ/ESSAY Questions and Answers, Nov/dec WAEC GCE 2024 questions and answers– Get free Biology Objective/Essay questions and answers for the 2024 WAEC GCE November/December exams. Access the second series of WAEC GCE Nov/Dec Biology (BIO) questions and answers objective/Essay right here.

2024 WAEC GCE Biology OBJ/ESSAY Questions and Answers

This is to inform all candidates taking the 2024 WAEC General Certificate of Education (GCE) November/December exam that the 2024 Biology (BIO) Objective/Essay questions and answers are now available here.

WAEC GCE Biology Exam Details:

  • Exam: Biology 2 (Objective and Essay/Theory)
  • Date: Wednesday, 27th November 2024
  • Time:
    • Biology 2 (Essay): 9:30 am – 11:10 am.
    • Biology 1 (Objective): 11:10 am – 12:00 pm.

To Get Early WAEC GCE Biology Questions and answers click on the link below 👇

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WAEC GCE 2024 Biology OBJ/ESSAY Questions and Answers

We are offering free Biology (BIO) Objective/Essay questions and answers for private candidates.

WAEC GCE BIOLOGY THEORY (ESSAY) ANSWERS 2024:

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BIOLOGY-ESSAY ANSWERS
(1ai)
(i)Body structure (number of segments, presence of cephalothorax, etc.)
(ii)Number and structure of appendages (legs, antennae, etc.)
(iii)Presence and structure of wings (if applicable)
(iv)Type of mouthparts and feeding structure
(1aii)
(i)Presence of gills or book lungs (indicating aquatic or terrestrial habitat)
(ii)Structure and adaptation of legs (e.g., webbed feet for aquatic habitat)
(1b)
(i)A semipermeable membrane (e.g., dialysis tubing)
(ii)A sucrose solution of varying concentrations
(iii)A potato or other plant tissue
(iv)A balance or scale to measure mass changes
(1c)
To calculate the length of the drawing, multiply the actual length by the magnification factor.
Length of drawing = actual length × magnification
= 10 cm × 1.5
= 15 cm
(1di)
(i)Accuracy: The drawing should accurately represent the organism or structure being depicted.
(ii)Proportion: The drawing should be in proportion, with all parts of the organism or structure correctly sized relative to each other.
(iii)Labeling: The drawing should be clearly labeled, with all important features identified.
(iv)Clarity: The drawing should be clear and easy to understand, with clean lines and minimal clutter.
(1dii)
(i)Dorsal view: A view of the organism from the back or top.
(ii)Ventral view: A view of the organism from the front or bottom.
(iii)Lateral view: A view of the organism from the side.
(2a) 
The feces of lizards are more solid than those of mammals due to the differences in their digestive systems. Lizards are ectothermic, meaning they rely on external sources of heat to regulate their body temperature. This slower metabolism allows them to extract more water from their food, resulting in more solid and less watery feces compared to the typically more liquid feces of mammals.
(2b)
(PICK ANY FIVE)
(i) Saliva
(ii) Gastric juice
(iii) Pancreatic juice
(iv) Bile
(v) Intestinal juice (from the small intestine)
(vi) Mucus
(2c) 
(PICK ANY THREE)
(i) Pepsin
(ii) Trypsin
(iii) Chymotrypsin
(iv) Elastase
(v) Carboxypeptidase A
(vi) Carboxypeptidase B
(2di)
(PICK ANY THREE)
(i) Both are biological catalysts
(ii) Both are involved in regulating biological processes
(iii) Both are produced by specialized cells or tissues
(iv) Both have a specific target or substrate
(v) Both require specific conditions (temperature, pH, etc.) to function optimally
(vi) Both can be affected by inhibitors
(2dii)
In Tabular Form 
=HORMONES=
 (PICK ANY THREE)
(i) Act as signaling molecules
(ii) Transported in the bloodstream
(iii) Influence distant target cells
(iv) Regulate complex processes
(v) Act at low concentrations
(vi) Have long-lasting effects
=ENZYMES=
(PICK ANY THREE)
(i) Act as catalysts
(ii) Act locally at the site of their production
(iii) Influence specific chemical reactions
(iv) Facilitate specific metabolic processes
(v) Act at higher concentrations
(vi) Have short-lived effects
(2e)
(i) Glucose – 1 molecule
(ii) Water – 6 molecules
(iii) Oxygen – 6 molecules

(3ai)
Ecology is the study of the relationships between living organisms and their environment. It examines how living things interact with each other and with the non-living components of their environment, such as air, water, and soil.

(3aii)
An ecosystem is a community of living organisms (plants, animals, and microorganisms) interacting with each other and with their physical environment. The components of an ecosystem are interdependent and form a complex web of relationships.

(3aiii)
The biosphere is the part of the Earth’s environment that supports life. It includes all the living organisms on the planet, as well as the physical environment they inhabit, such as the atmosphere, hydrosphere, and lithosphere.

(3bi)
(PICK ANY TWO)
(i) Producers
(ii) Consumers
(iii) Decomposers
(iv) Abiotic factors

(3bii)
(PICK ANY TWO)
(i) Producers: Organisms that can synthesize their own food, usually through photosynthesis, and form the base of the food chain.
(ii) Consumers: Organisms that obtain energy by consuming other organisms, either directly (herbivores) or indirectly (carnivores and omnivores).
(iii) Decomposers: Organisms that break down dead organic matter, releasing nutrients back into the environment for reuse by producers.
(iv) Abiotic factors: The physical and chemical components of the environment, such as water, air, soil, and sunlight, which provide the necessary resources and conditions for life.

(3ci)
(PICK ANY FOUR)
(i) High species diversity
(ii) Lush vegetation and dense canopy
(iii) Warm and humid climate year-round
(iv) High rainfall (typically over 2,000 mm per year)
(v) Nutrient-poor soil
(vi) Vertical stratification of the vegetation

(3cii)
(PICK ANY TWO)
(i) Tall, straight trunks to reach the canopy and compete for sunlight
(ii) Broad, flat leaves to maximize light absorption for photosynthesis
(iii) Buttress roots to provide stability in the shallow, nutrient-poor soil
(iv) Ability to shed leaves during the dry season to conserve water
(v) Bark that is resistant to fire and pests
(vi) Seed dispersal mechanisms

(4ai)
Organic evolution refers to the process by which species of living organisms change over time through variations in traits, inheritance, and natural selection. It is the gradual development of new species from common ancestors through genetic changes and adaptation to their environment.

(4aii)
(i) Fossil Record
(ii) Comparative Anatomy
(iii) Embryology
(iv) Molecular Biology
(v) Biogeography

(4bi)
The Theory of Use and Disuse suggests that body parts or organs that are used frequently become stronger and more developed, while those that are not used may diminish or disappear over generations. The idea is that environmental demands lead to the development or reduction of certain features based on their utility

(4bii)
Jean-Baptiste Lamarck.

(4biii)
(i) Giraffes
(ii) Aquatic organisms (like amphibians and their legs)

(4c)
Mutation refers to a sudden, random change in the genetic material (DNA) of an organism. Mutations introduce new genetic variations in a population. Some mutations are beneficial, giving organisms a survival advantage and thus increasing the likelihood of passing on these traits to future generations. Over time, these beneficial mutations accumulate and contribute to the evolution of new species

(4d)
(i) Aestivation: Lizard
(ii) Basking: Bat
(iii) Territoriality: Monkey
(iv) Hibernation: Polar bear

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WAEC GCE BIOLOGY OBJECTIVE (OBJ) ANSWERS 2024:

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2024 WAEC GCE Biology Questions and Answers – Study Materials

Objective Questions (Biology 1):

WAEC GCE Biology Questions (Objective):

  1. Which of the following is a function of the cell membrane?
    • A. Protein synthesis
    • B. Control of substances entering and leaving the cell
    • C. Storage of genetic material
    • D. Energy production
    • Answer: B. Control of substances entering and leaving the cell
  2. Which process results in the formation of gametes?
    • A. Mitosis
    • B. Meiosis
    • C. Fertilization
    • D. Binary fission
    • Answer: B. Meiosis
  3. The movement of water molecules from a region of higher concentration to a region of lower concentration through a semi-permeable membrane is known as:
    • A. Diffusion
    • B. Osmosis
    • C. Active transport
    • D. Plasmolysis
    • Answer: B. Osmosis
  4. In which part of the plant does photosynthesis occur?
    • A. Root hairs
    • B. Stem
    • C. Chloroplasts in the leaves
    • D. Flowers
    • Answer: C. Chloroplasts in the leaves
  5. Which of the following is not a characteristic of all living things?
    • A. Respiration
    • B. Growth
    • C. Movement
    • D. Photosynthesis
    • Answer: D. Photosynthesis

Sample WAEC GCE Biology Essay Questions:

  1. Explain the process of photosynthesis and the importance of this process to plants.
    • Answer: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose. This process occurs in the chloroplasts of plant cells, where chlorophyll absorbs light energy. The general equation for photosynthesis is 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂. Photosynthesis is important because it provides the primary source of energy for all living organisms and releases oxygen, which is essential for respiration.
  2. Discuss the differences between mitosis and meiosis.
    • Answer: Mitosis is a type of cell division that results in two identical daughter cells with the same number of chromosomes as the parent cell. It occurs in somatic cells for growth and repair. Meiosis, on the other hand, is a type of cell division that results in four non-identical daughter cells, each with half the number of chromosomes of the parent cell. It occurs in gametes (sex cells) for the purpose of sexual reproduction. While mitosis results in diploid cells, meiosis results in haploid cells.
  3. Describe the structure and function of the human heart.
    • Answer: The human heart is a muscular organ located in the thoracic cavity, between the lungs. It has four chambers: two atria (upper chambers) and two ventricles (lower chambers). The right side of the heart pumps deoxygenated blood to the lungs through the pulmonary artery, while the left side pumps oxygenated blood to the rest of the body through the aorta. Valves between the chambers ensure a unidirectional flow of blood. The heart functions as a pump, maintaining blood circulation throughout the body, delivering oxygen and nutrients to tissues, and removing carbon dioxide and waste products.

These questions should provide a solid basis for your study and help you prepare for the types of questions that might appear in your WAEC GCE Biology exam.

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