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TEACHER’S NAME………………………………………….TSC NO………………………………….SCHOOL/INSTITUTION…………………………………………………………………………………FORM: THREESUBJECT: BIOLOGY TOPIC: CLASSIFICATION IISUB TOPIC: PHYLUM CHORDATA WEEK: SEVEN LESSON NO: ONEDATE……………………………………………………….TIME…………………………………………OBJECTIVES: By the end of the lesson the learner should be able to:Describe the phylum chordataExplain the main characteristics of organisms in phylum chordataName the main classes of phylum chordataTIME CONTENTLEARNING ACTIVITIESRESOURCE MATERIALS 5 mins30 mins5 mins IntroductionReview the previous lesson by briefly explaining the general characteristics of the insects and the economic importance of the insects and the overall characteristics of the organisms in phylum arthropodaLesson developmentStep1Describing the phylum chordateInclude fishes, amphibians, reptiles, birds and the mammals. The term chordate is derived from the term notochord. A notochord is a long flexible rod-like structure found in chordatesThey inhabit aquatic and terrestrial environmentsStep 2Explaining the main characteristics of the organisms in phylum chordatenotochorddorsal slits (pharyngeal cleft during development)bilateral symmetrytriploblastic (three layer body-ectoderm, mesoderm and endoderm)clear cut head formationmultilayered epidermispost anal tailclosed circulatory systemsegmented muscle blocks(myotomes)single pair of gonads Step 3Naming the main classes of the phylum chordate;PiscesAmphibiansReptiliaAvesMammalia Conclusion Review the lesson by briefly explaining the characteristics of the organisms in phylum chordate and give the various classes of the organisms in phylum chordataQuestions and answers statingDiscussion Explanation NamingExplanationsQuestionsDiscussionObservation and recordingNotes takingExplanationQuestions and answer statingDiscussion KLB Biology book three page 16Class notesLongman KCSE revision biologyExplore biology book threeKLB Biology book three page 16-17Class noteCourse bookTeaching guideChalk boardChalks KLB Biology book three page 16-17SELF EVALUATION; ................
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