2023 Biology Lesson Note for third term SS2
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BIOLOGY LESSON NOTE FOR THIRD TERM SS2
This Lesson Note on Biology for SS2 third term covers weekly prepared lesson notes and each of them is rich in classwork, curriculum compliant, and syllabus based.
The lesson note is well-detailed with adequate evaluation to ensure that the learning objectives are achieved.
The scheme of work used in preparing the lesson note is based on the latest unified NERDC/UBE curriculum which is suitable for all schools in all the States in Nigeria.
Keep reading, you will find the Link to Download the complete lesson note in Ms-Word (Microsoft Word) Editable format below.
Biology Scheme of Work for SS2 Third Term
WEEK 1: Excretion in Lower Organisms
WEEK 2: Excretory System in Vertebrates and Plants
WEEK 3: Male and Female Reproductive Structures
WEEK 4: Sexual Reproduction
WEEK 5: Reproduction in Plants
WEEK 6: Pollination
WEEK 7: Ecological Succession
WEEK 8: Overcrowding and Food Shortage
WEEK 9: Balance in Nature
WEEK 10: Family Planning
WEEK 11: Revision
WEEK 12: Examination
WEEK 13: Examination
REFERENCE BOOKS:
- Modern Biology for Senior Secondary Schools by S.T. Ramalingam
- Essential Biology by M.C Michael
- New School Biology by H. Stone and Cozen
- SSCE Past Questions and Answers
- New System Biology by Lam and Kwan
- College Biology by IdodoUmeh
- UTME and Cambridge Past Questions and Answers
- Biology Practical Textbook
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BIOLOGY LESSON NOTE FOR THIRD TERM SS2
Below are the Excerpts (Samples) of the 2023 Complete Biology Lesson Notes for SS2 Third Term
WEEK 1: EXCRETION AND EXCRETORY SYSTEM
CONTENT
- Excretion
- Types of Excretory structures and Taste
- Excretory Structures in some Organisms
EXCRETION
Excretion is the process by which metabolic waste products are removed from the body of all living things. Excretion is different from egestion which is the removal of solid waste (undigested food substances i.e.faeces) through the anus. Excretion is necessary for the following reasons:
- To avoid or prevent any harm that would be caused by any excretory product.
- Some excretory products are poisonous to the body and should be removed.
- To maintain water balance in the body (homeostasis).
- To avoid interference of waste products with normal metabolic activities in the body.
EXCRETORY STRUCTURES AND WASTE IN ORGANISMS
| Organism | Excretory Structure | Excretory Waste Product |
| Protozoa | Contractile vacuole | C02, ammonia and water |
| Flatworm | Flame cells | C02, ammonia and water |
| Earthworm | Nephridia | C02, ammonia and water |
| Crustacean | Green glands | C02, ammonia and water |
| Insect | Malpighian tubules | C02, ammonia and uric acid |
| Fish | Kidney | C02, ammonia and water |
| Amphibian(toad) | Kidney | H20 and salt |
| Reptiles | Kidney | H20 and salt |
| Birds | Kidney and lungs | C02 and water vapour |
| Mammals | Kidney, lungs, skin and liver | C02, water, urea |
| Flowering plants | Stomata, lenticels and leaves | H20, C02, 02. tannins, gum, alkaloids, oil and latex |
EVALUATION
- List five excretory structures adapted to aquatic habitat
- Mention four excretory waste in plants
TYPES OF EXCRETORY SYSTEMS
CONTRACTILE VACUOLE IN PROTOZOA
Contractile vacuole is a simple structure found in the cell of fresh water protozoa. Water constantly enters the cell of a protozoan through the selectively permeable membrane because the cell is hypertonic to its environment. As water enters the cell, a contractile vacuole is formed which collects the water and expands, when it reaches the maximum size, it contracts and discharges the water through a temporary break in the cell membrane at interval. Excretion of carbon dioxide and ammonia is by diffusion through the cell membrane
FLAME CELL IN FLATWORMS
The excretory system consists of two longitudinal canals with branched tubules which end in flame cells. The flame cell has a large hollow called the cell lumen with bunch of flagella hung on it. Waste product from the surrounding cells enters the flame cells. The flagella help to propel the fluid into the tubules. The fluid passes into the exterior through a narrow tube called duct.
NEPHRIDIUM IN EARTHWORM
A pair of nephridia is found on each segment of the earthworm except the three and the last. Each nephridium consists of a ciliated funnel, nephrostome which leads into a long coiled tube (narrow and middle ciliated tubes, wide non-ciliated tubes and muscular tube). The tube opens to the exterior as nephriodiophore (excretory pore). Waste product mainly urea is absorbed from blood capillaries surrounding the nephridia. The fluid containing the waste through the long tube of the nephridia, salt and other useful substances are reabsorbed through the wall of the tube. The unabsorbed substances and water gather in the muscular tube and discharge to the exterior through the excretory pore.
EVALUATION
- How are excretory products removed in amoeba and earthworm?
- Describe the excretory structure in flatworm.
MALPIGHIAN TUBULE IN INSECT
Malpighian tubules are found between the midgut (small intestine) and the hindgut (large intestine). One end opens into the gut while the other end closed freely floats in the haemocoel. Nitrogenous waste and water in the haemocoel are absorbed at the distal close end into the tubule. The waste is converted into uric acid as it passes along the malpighian tubule towards the gut. A lot of water is also reabsorbed so that by the time the uric acid reaches the proximal end, it is changed to solid crystals. More water is reabsorbed in the rectum therefore concentrated urine leaves the body as almost dried solid.
GENERAL EVALUATION
- Define excretion.
- Explain the necessity for an excretory system in animals.
- Describe the mechanism of excretion in insects.
- List five excretory product in plants.
- Differentiate between excretion and egestion.
READNG ASSIGNMENT
College Biology, chapter 9, pages 186-204
WEEKEND ASSIGNMENT
SECTION A
- The organelle which eliminates water from the body of protozoa is A. plasma membrane B. contractile vacuole C. cell wall D. nucleus
- In insects, the structure that performs the same function as the kidney in man is the A. nephridium B. flame cell C. malpighian tubule D. trachea
- The excretory structure in earthworm is the A. malpighian tubule B. nephridium C. kidney D. flame cell
- Flame cells are the A. excretory systems of worms B. excretory and respiratory systems of flatworms C. excretory systems of flatworms D. secretory systems of flatworms
- Which of these is a waste product of an insect? A. alkaloids B. uric acid C. sweat D. mucilage
SECTION B
- State the similarities and differences between excretory organs of a mammal and earthworm
- State three factors that leads to the opening and closing of stomata
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WEEK 2: EXCRETORY SYSTEM IN MAMMALS AND PLANTS
Overview:
CONTENT
- Excretory system in mammals
- Structure and functions of the kidney
- Structure of the urinary tubule
- Process of urine formation
- Excretion in plants
EXCRETORY SYSTEM IN MAMMALS
Mammalian lungs excrete water vapour, and C02, the liver excretes bile pigment called bilirubin, the skin excretes water, salt and urea through the sweat, and the kidney excretes water, mineral salt and urea. The excretory system of mammals consists of… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
WEEK 3: MALE AND FEMALE REPRODUCTIVE STRUCTURES
Overview:
CONTENT
- Structures and Functions of the Reproductive System (Male and Female)
- Structure of the Gametes (Sperm and Ovum)
- Differences Between Male and Female Reproductive Organs
REPRODUCTIVE SYSTEM
Most multicellular animals and plants undergo a complex form of sexual reproduction in which especially differentiated male and female reproductive cells (gametes) unite to form a single cell, known as a zygote, which later undergoes successive divisions to… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
WEEK 4: MALE AND FEMALE REPRODUCTIVE STRUCTURES
Overview:
Continuation of Week 3… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
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Biology Lesson Note for SS2 (Third Term)
WEEK 5: REPRODUCTIVE SYSTEM IN PLANTS
Overview:
CONTENT
- Structures and Functions of the Reproductive Organs in Plants
- Arrangement of Reproductive Organs in Plants
- Types of Flowers
- Kinds of Placentations
STRUCTURES AND FUNCTIONS OF THE REPRODUCTIVE ORGANS IN PLANTS
The flower is the reproductive structure of a flowering plant. It has both male and female sex organs hence it can carry out sexual reproduction. After fertilization has… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
WEEK 6: POLLINATION
Overview:
CONTENT
- Definition
- Pollination in plants
- Features of self and cross pollinated flowers
- Agents of pollination
DEFINITION
This is the transfer of mature pollen grains from the anther of one flower to the mature stigma of the same or another flower of the same plant or another plant of closely related species. Pollination usually precedes fertilization. There are… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
WEEK 7: ECOLOGICAL SUCCESSION
Overview:
CONTENT
- Introduction
- Types of Succession
- Differences Between Successions
- Characteristics of Succession
- Outcome of Succession
ECOLOGICAL SUCCESSION
The orderly change in the inhabitants of an area over time is called succession. It can also be defined as the step by step orderly and gradual… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
WEEK 8: OVERCROWDING AND FOOD SHORTAGE
Overview:
CONTENT
- Overcrowding
- Factors Causing Overcrowding
- Effects of Overcrowding
- Adaptation to Overcrowding
- Food Shortage
OVERCROWDING
This is a situation in which a population increases beyond a point called the carrying capacity where the resources (e.g. food and space) are not enough to support all the individuals in thepopulation. Therefore… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
Biology Lesson Note for SS2 (Third Term)
WEEK 9: BALANCE IN NATURE AND FAMILY PANNING
Overview:
CONTENT
- Dynamic Equilibrium in Nature
- Factors Affecting Population
- Abiotic Factors Affecting Population
- Biotic factors affecting Population
- Family planning and birth control
DYNAMIC EQUILBRIUM IN NATURE
When population-influenced factors (abiotic and biotic) are favourable, growth is promoted but when they are unfavourable growth is retarded. A factor which limits the population growth is called a LIMITING FACTOR. The sum of all the limiting factors is known as ENVIRONMENTAL RESISTANCE
The net effect of the abiotic and biotic factors is at a point, the… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
WEEK 10: BALANCE IN NATURE AND FAMILY PANNING
Overview:
Continuation of Week 9…… To Download the Full Lesson Note Online, CLICK HERE. You can also reach us on WhatsApp, Click Here to Chat with us.
WEEK 11: Revision
WEEK 12: Examination
WEEK 13: Examination
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