BIOLOGY LESSON NOTE ON CROP PROPAGATION

Image
Topic: Crop Propagation Class: Senior Secondary School 2 (SS2) Subject: Biology Specific Objectives By the end of this lesson, students should be able to: Define crop propagation. Differentiate between sexual and asexual propagation. Identify and explain various methods of crop propagation. Highlight the advantages and disadvantages of each method. Recognize common examples of crops propagated using each method. Lesson Content 1. Meaning of Crop Propagation Crop propagation refers to the process by which plants reproduce or are reproduced to give rise to new plants. This can occur naturally or be carried out artificially by farmers or agricultural scientists. It is a vital practice in agriculture that ensures the continuous production of food and other plant-based resources. 2. Types of Crop Propagation Crop propagation is broadly categorized into two main types: Sexual Propagation (Seed Propagation) Asexual Propagation (Vegetative Propagation) 3. Sexual Propa...
Post a Comment

Conditions Necessary for Respiration

 

Conditions Necessary for Respiration

For effective exchange of gases to take place, the following conditions must be met:

Respiratory medium: This refers to the environment from which the organism inhales oxygen. Examples include air and water.

Respiratory organ: This refers to the organ possessed by the organism needed to inhale oxygen from the environment and exhale CO2 and water vapour. Examples of such organs are lungs in mammals and gills in fishes.

Transport medium: This is needed to transport the dissolved oxygen to the various cells of the body which in turn picks up CO2 and other waste products for the elimination process. An example is blood in mammals.

Ventilation: This is the movement of air in the direction over the respiratory surface. This ensures the replacement of used oxygen and the elimination of waste products. An increase in the rate of gaseous exchange is facilitated by a ventilation mechanism. An example is breathing in human.

Respiratory surface: This refers to the actual surface of the body where gaseous exchange takes place. Examples include alveoli in mammals and cell membrane in amoeba.

Comments

Post a Comment

Popular posts from this blog

CHEMISTRY LESSON NOTE FOR SS1, SS2 AND SS3 pdf

SCHEME OF WORK  SS1 first term Practical introduction to chemistry Chemical industry Definition of chemistry Particulate nature of matter Molecular concept Dalton’s Atomic theory Isotope and isotopy Symbols and formulae Mole concept Empirical and molecular formulae Laws of chemical combination SS1 second term  Electronic configuration Chemical combination States of matter Kinetic theory Gaseous state and gas laws Separation techniques Acids, Bases and salts Indicators and pH Hygroscopic, efflorescent and Deliquescent salts SS1 third term Water and Solutions Hardness of water Solubility Periodic table SS 2 first term Energy concept Exothermic and Endothermic reaction Energy profile diagram Rate of reaction Chemical equilibrium Hydrogen compounds Oxygen compounds Oxidation and Reduction Oxidizing and reducing agent SS 2 second term Electrolysis Selective discharge of ions Electrolytic cell Qualitative and quantitative Analysis Water treatment SS 2 third term Carbon and in...
Read more

SS1 SECOND TERM BIOLOGY SCHEME OF WORK

SS1 SECOND TERM BIOLOGY SCHEME OF WORK  TOPICS Tissue and supporting system Vertebrate skeleton  Supporting tissues in plant Nutrition in animals  Mammalian teeth  Basic ecological concepts  Population studies by sampling method  Ecological factors  Functioning ecosystem  Tropic levels  Revision  Examination 
Read more

BIOLOGY LESSON NOTE ON TRANSPORT SYSTEM

Image
Topic: Transport    System Instructional   Materials:  Models , specimen, pictures Aim of the Lesson: To help the learner understand the transport system Anticipated Problems: Because of advancement in class, most themes might be new to the learner and might result to difficulty in understanding. Possible Solution: The teacher explains the concept in details using illustrations and real objects. Content Objectives : By the of the lesson, learner should be able to; Define   of transport system State the need for transport system Explain transport system in lower organism List the materials for transport Explain the media for transportation of materials Explain the mechanism of transportation in some organism and Unicellular organism and Simple multicellular organism Explain transport system in man  Time Table fit/ previous knowledge: The learners learnt about the digestive system in their previous class. Set...
Read more