Note for teachers using this lesson plan
This lesson introduces Senior Secondary 1 students to the fundamental characteristics that define living organisms and the key differences between plants and animals. Teachers should prepare live specimens of plants and animals, flash cards for the MR NIGER-D acronym, and ensure video clips/simulations are ready to illustrate these characteristics. Emphasise observation and critical thinking to help students classify organisms and understand the basic processes of life.
Class: SS 1
Term: First Term
Week: 9
Age: 15 years
Duration: 60 minutes
Subject: Biology
Curriculum Theme: Organization of Life and Biochemical
Focal competence: Describing common characteristics of living organisms
Key competencies/values: Critical Thinking; Collaboration
Skills:
- Classifying living things into plants and animals
- Identifying living things based on their characteristic
Previous Lesson: Biology, Its Branches, Relationship with Other Science Subjects
Topic: Characteristics Of Living Things
Subject Matter: Characteristics of Living Things, Differences between Animals and Plants
Specific Objectives
By the end of the lesson, pupils/students should be able to:
Cognitive Domain
- Identify the characteristics of living things.
- Discuss what makes an organism a living thing.
- Differentiate between plants and animals.
- Compare and contrast plants and animals.
Affective Domain
- Appreciate the diversity and complexity of living organisms.
- Show curiosity about the life processes of different organisms.
Psychomotor Domain
- Classify collected living things into plants and animals based on their characteristics.
- Use flash cards to identify and describe the characteristics of living things.
Social Domain
- Collaborate effectively in small groups during observation and classification activities.
Reference Materials
The following resources were used in planning this lesson:
- 2025 New Revised Senior Secondary Education Curriculum (SSEC)
- Relevant State Unified Scheme of Work
- Modern Biology for Senior Secondary Schools by Sarojini T. Ramalingam
- The HeadTeacher Scheme of work For The New Revised Senior Secondary Education Curriculum (SSEC)
Instructional Materials
The teacher will teach this lesson with the aid of:
- Flash Cards containing letters of MR NIGER-D
- Sample of live plants (e.g., potted plant, leaf samples)
- Sample of live animals (e.g., insects in a jar, small fish in a bowl – ensure ethical handling)
- Video clips and simulations showing plants and animals and their characteristics
- Whiteboard/Blackboard and markers/chalk
Rationale for the Lesson
This lesson provides foundational knowledge in Biology by enabling students to understand what defines life. Recognising the characteristics of living things and the distinctions between plants and animals is crucial for further studies in ecology, physiology, and classification. It helps students appreciate the interconnectedness of life and their place within the natural world.
Prerequisite/Previous Knowledge
Students should have a basic understanding of organisms and their environment from their Junior Secondary school Biology lessons.
Lesson Content/Board Summary
Characteristics Of Living Things
Characteristics of Living Things
Living things are organisms that possess certain unique features or processes that distinguish them from non-living things. These characteristics are essential for survival and continuity of life. A common mnemonic to remember these characteristics is MR NIGER-D:
- Movement: The ability of an organism to change its position or the position of its body parts. Animals exhibit locomotion (movement from one place to another), while plants show growth movements (e.g., bending towards light, opening and closing of flowers).
- Respiration: The process by which living organisms break down food substances to release energy for various life activities. This can be aerobic (with oxygen) or anaerobic (without oxygen).
- Nutrition: The process by which organisms obtain and utilise food for energy, growth, and repair. Plants are autotrophic (make their own food through photosynthesis), while animals are heterotrophic (obtain food from other organisms).
- Irritability (Sensitivity): The ability of an organism to detect and respond to changes in its internal or external environment. These changes are called stimuli (e.g., light, temperature, touch, chemicals).
- Growth: An irreversible increase in the size, mass, and complexity of an organism. This involves an increase in the number and size of cells.
- Excretion: The process of removing metabolic waste products (e.g., carbon dioxide, urea, excess water) from the body. These waste products can be toxic if allowed to accumulate.
- Reproduction: The process by which living organisms produce new individuals of their own kind, ensuring the continuity of the species. This can be asexual (one parent) or sexual (two parents).
- Death: The cessation of all life functions. While not a process like the others, it is an inevitable part of the life cycle of all living organisms.
Differences Between Animals and Plants
While both plants and animals are living organisms and share the general characteristics mentioned above, they exhibit significant differences in their structure, nutrition, and movement patterns. These differences are summarised in the table below:
| Feature | Animals | Plants |
|---|---|---|
| Nutrition | Heterotrophic (obtain food from external sources, e.g., by ingestion). | Autotrophic (produce their own food through photosynthesis). |
| Movement | Exhibit locomotion (move from one place to another). | Generally stationary; show growth movements (e.g., bending, flowering) and movement of parts (e.g., leaves closing). |
| Cell Wall | Absent. | Present, made of cellulose, providing rigidity and support. |
| Chloroplasts | Absent. | Present (in photosynthetic parts), containing chlorophyll for photosynthesis. |
| Growth | Determinate (growth stops after reaching a certain size or stage). | Indeterminate (growth continues throughout their life, especially at meristems). |
| Response to Stimuli | Rapid and often complex responses, involving nervous and endocrine systems. | Slower and less complex responses, often involving hormones. |
| Reserve Food | Glycogen and fat. | Starch and oil. |
| Vacuoles | Small and scattered, or absent. | Large, central vacuole in mature cells, maintaining turgor. |
Teaching Methods/Instructional Techniques
Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Observation, Group Work, Video Presentation.
Instructional Procedures
Step 1: Introduction
Time: 5 minutes
Teaching Skill: Questioning/Engagement
Teacher’s Activity: The teacher greets the students and asks them to identify some objects in the classroom as living or non-living (e.g., chair, student, plant). The teacher then asks what makes them classify these objects as such.
Pupils’ Activity: Pupils respond by identifying objects and giving reasons for their classification.
Learning Point: Distinguishing living from non-living
Step 2: Identifying Characteristics of Living Things
Time: 10 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher introduces the concept of characteristics of living things using the MR NIGER-D acronym. The teacher uses flash cards for each letter, explaining what each characteristic means and providing simple examples.
Pupils’ Activity: Pupils observe the flash cards, listen to the explanations, and repeat the acronym and characteristics.
Learning Point: MR NIGER-D characteristics
Step 3: Observation of Live Specimens
Time: 10 minutes
Teaching Skill: Observation/Guided Inquiry
Teacher’s Activity: The teacher presents live samples of plants and animals (e.g., a potted plant, an insect in a jar). The teacher guides students to observe and identify some of the characteristics of living things demonstrated by these specimens (e.g., plant growth, insect movement, breathing).
Pupils’ Activity: Pupils observe the live specimens and point out observable characteristics of life.
Learning Point: Observable life characteristics
Step 4: Video Analysis and Discussion
Time: 10 minutes
Teaching Skill: Video Presentation/Discussion
Teacher’s Activity: The teacher plays video clips and simulations showing various characteristics of living things (e.g., a plant responding to light, an animal feeding, cellular respiration). The teacher pauses the video to discuss each characteristic as it is demonstrated.
Pupils’ Activity: Students watch the video clips, discuss observations in small groups, and contribute to the class discussion.
Learning Point: Visualising life processes
Step 5: Group Classification Activity
Time: 5 minutes
Teaching Skill: Group Work/Classification
Teacher’s Activity: The teacher divides students into small groups and provides them with pictures or descriptions of various organisms (from a “nature tour” or prepared images). The teacher guides them to classify these organisms into plants or animals based on the characteristics discussed.
Pupils’ Activity: Students work in groups to classify the organisms and discuss their reasoning.
Learning Point: Classifying organisms
Step 6: Differentiating Plants and Animals
Time: 5 minutes
Teaching Skill: Explanation/Comparison
Teacher’s Activity: The teacher explains the key differences between plants and animals, focusing on nutrition (autotrophic vs. heterotrophic) and movement (locomotive vs. growth movement). The teacher uses the table from the board summary to highlight these distinctions.
Pupils’ Activity: Pupils listen, ask questions, and note the key differences between plants and animals.
Learning Point: Plant-animal distinctions
Step 7: Evaluation/Review
Time: 5 minutes
Teaching Skill: Questioning/Assessment
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:
- List five characteristics of living things.
- Explain what makes an organism a living thing.
- State two major differences between plants and animals.
- Give an example of movement in plants and an example in animals.
Pupils’ Activity: Pupils answer orally and in writing.
Learning Point: Understanding living characteristics
Step 8: Note-Taking
Time: 10 minutes
Teaching Skill: Guided Writing
Teacher’s Activity: The teacher guides pupils/students to copy the essential Board Summary notes on the characteristics of living things and the differences between plants and animals into their notebooks.
Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.
Learning Point: Recording lesson notes
Step 9: Conclusion
Time: 5 minutes
Teaching Skill: Reinforcement
Teacher’s Activity: The teacher summarises the lesson by reiterating that all living things share common characteristics, but plants and animals have distinct differences that enable them to survive in their respective environments. The teacher encourages students to observe these characteristics in their daily lives.
Pupils’ Activity: Pupils listen and ask any final questions.
Learning Point: Consolidating life characteristics
Continuous Assessment/Further Study
Type: Homework
Instruction: Answer the following questions in your notebook.
- Describe the process of nutrition in plants and animals, highlighting the key difference.
- Choose any three characteristics of living things and explain how a human being exhibits each one.
- Research and list two examples of plants that show clear movement in response to stimuli.
Lesson Keywords
- Living things – Organisms that possess characteristics of life.
- Non-living things – Objects that do not possess characteristics of life.
- Movement – Change in position or location.
- Respiration – Release of energy from food.
- Nutrition – Obtaining and utilising food.
- Irritability – Response to stimuli.
- Growth – Irreversible increase in size and mass.
- Excretion – Removal of waste products.
- Reproduction – Producing new individuals.
- Autotrophic – Organisms that make their own food (e.g., plants).
- Heterotrophic – Organisms that obtain food from others (e.g., animals).
- Locomotion – Movement from one place to another.
Differentiation
For students needing support: Provide simplified flash cards with pictures for each characteristic. Pair them with stronger students for group activities. Focus on identifying 3-4 key characteristics rather than all eight.
For advanced students: Challenge them to research and present on unusual examples of living things that might seem to defy typical characteristics (e.g., carnivorous plants, sessile animals). Ask them to explain the biochemical basis of respiration or photosynthesis.
Suggested Lesson Videos
Search on YouTube for: characteristics of living things SS1 biology
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