Lesson Notes By Weeks and Term - Senior Secondary 2

Reproductive system in plants

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TERM – 2ND TERM

WEEK SEVEN

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Biology

Topic: REPRODUCTIVE SYSTEM IN PLANTS

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Define a flower
  2. Identify the types of flowers

iii. Explain some terms used in the study of flowers

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher introduces floral plant and it's types to the students

Students pay

attention

STEP 2

EXPLANATION

Teacher list and explain terms used in the study of flowers

Students pay

attention and

participate

 

STEP 3

DEMONSTRATIO

N

Teacher aid students to identify the essential and non essential parts of a flower

Students pay

attention and

participate

STEP 4

NOTE TAKING

The teacher writes a summarized

note on the board

 

The students

copy the note in

their books

 

NOTE

REPRODUCTIVE SYSTEM IN PLANT

Flower

A flower is the reproductive structure of angiosperms, the flowering plants. It is a complex structure consisting of modified leaves arranged in whorls. Flowers play a crucial role in the sexual reproduction of plants.

Types of Flowers

  1. Complete Flower: Has all four main floral parts – calyx, corolla, androecium, and gynoecium.

       

       2. Incomplete Flower: Lacks one or more of the main floral parts.

Types of Ovaries

   - Superior Ovary: The ovary is positioned above the attachment point of other floral parts.

   - Inferior Ovary: The ovary is situated below the attachment point of other floral parts.

Important Terms Used to Study Flowers

  1. Bisexual (Hermaphrodite): Flowers with both male (androecium) and female (gynoecium) reproductive organs.
  2. Unisexual (Monoecious and Dioecious):

     - Monoecious: Plant has both male and female flowers on the same individual.

     - Dioecious: Plant has either male or female flowers on separate individuals.

  1. Inflorescence: A group or cluster of flowers arranged on a stem.
  2. Regular (Actinomorphic) and Irregular (Zygomorphic) Flowers:

     - Regular (Actinomorphic):Can be divided into equal halves in any radial plane.

     -Irregular (Zygomorphic): Can be divided into two similar halves only in one specific plane.

  1. Perfect and Imperfect Flowers:

     - Perfect: Bisexual flowers with both stamens and carpels.

     - Imperfect: Unisexual flowers with either stamens or carpels.

  1. Complete and Incomplete Flowers:

     - Complete: Flowers with all four main floral parts (calyx, corolla, androecium, gynoecium).

     - Incomplete: Lack one or more of the main floral parts.

  1. Pollination and Fertilization: Processes involving the transfer of pollen to the stigma (pollination) and the fusion of male and female gametes (fertilization).

EVALUATION: 1. What is a flower.?

  1. Identify the two types of a flower
  2. What is pollination?

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively