REPRODUCTION IN PLANTS

TITLE:  LESSON NOTE ON BASIC SCIENCE AND TECHNOLOGY

SUBJECT: BASIC SCIENCE AND TECHNOLOGY

TERM: SECOND TERM

THEME: LIVING AND NON LIVING THINGS

WEEK: WEEK 5 and 6

CLASS: PRIMARY 5

NAME OF TEACHER:

DATE:          

AGE OF STUDENTS:

CLASS COMPOSITION: Slow and fast learners.

PERIOD:

 TIME: 40 MINUTES

TOPIC: REPRODUCTION IN PLANTS

PERFORMANCE OBJECTIVES

At the end of this lesson, Pupils should be able to:

  1. Identify part of a flower.
  2. Explain type and agent of pollination
  3. Identify parts of a flower that are concerned with pollination and fertilization.
  4. Distinguish between pollination and fertilization.
  5. Describe stages of development from flowers to fruit.

TEACHING AND LEARNING MATERIALS

  • Toys of domestic animals
  • Whiteboard/Chalkboard
  • Explanatory posters/pictures showing domestic animals.
  • Explanatory videos on domestic animals.

TEACHING AND LEARNING METHODS

  • Explanation
  • Discussion
  • Questions and answer

REFERENCE MATERIALS

  • NERDC Basic Education Curriculum for primary schools.
  • Universal Basic Education Curriculum for primary schools.
  • Lagos State Scheme of Work for Basic Science and Technology.
  • Unified Schemes of Work for Lagos State Primary Schools (MIDDLE BASIC)
  • Online Materials.
  • Edudelight Basic Science and Technology for Primary Schools.

ENTRY BEHAVIOUR/ PREVIOUS KNOWLEDGE: the students have been taught the human body (skeletal system).

WORD FILE: characteristic, developed, reproductive.

                  LESSON CONTENT

REPRODUCTION

Reproduction is the ability of living things to reproduce young ones of their own kind. Reproduction is one of the characteristic of living things. Without living thing reproducing it young one, then there would be no living things on earth anymore.

.

Way by which plant reproduce their young ones.

  1. Sexual reproduction: flowering plants make use of seeds.  In most plants, the seedlings are developed from their seeds, which is obtained from flower when the male and female parts of flower meet to form union, seeds are obtained from flower.
  2. Asexual or Vegetative Reproduction: the use of vegetative parts of plants (leaves, stems, buds and roots). Some plants part can also reproduce young ones without seeds, plants like cassava  can reproduces by planting of the stem and  yam can reproduces by planting the  tuber.

                       PARTS OF A FLOWER

Flower is the organ responsible for producing fruits in flowering plants. So, the male and the female reproductive parts of a plant are in the flower.

The two (2) major parts of flower are:

  1. The Stamen or the Male part: it consist of the anther and filament.
  2. The pistil or the female part: it consist of the ovary, stigma and style.

FUNCTIONS OF EACH PART OF A FLOWER

Part of a flower function
Anthers It produces pollen grains
Stigma Receives pollen grains during pollination
Sepals Protects the floral parts in the bud
Petals Attracts insect because of the possession of sweet smell and bright colours.
Style It is the pollen tubes that carries the male gamete into the female gamete (ovary)
Ovary It houses the egg or the ovule
Filament It holds the anther

POLLINATION

Pollination is the transfer of pollen grains (Yellow dust) from the anther into the stigma (sticky section) of a flowering plant during reproduction.

The pollen grains are the yellow dust which contains the male sex cell or sperm while the stigma is the sticky section. So when the pollen grains from the male flower drops on the stigma of the female part, the process is called pollination.

TYPES OF POLLINATION

We have two types of pollination. These are:

  1. Self-Pollination: pollen grains from the flower are transferred from the anther into stigma of the same flowering plant.
  2. Cross Pollination: the pollen grains from one flower is carried to the stigma of another flower of the same kind.

AGENT OF POLLINATION

The agent of pollination are man, wind, insect, birds, snail, etc

POLLINATION BY INSECT

Insects like butterfly, moths, bees are the most common agent of pollination because they visit flowers regularly to suck the sweet liquid called NECTAR. After sucking the nectar the pollen grains stick to their body and when they touch the stigma of the same plant or other plant of same kind, the pollen grains then drop into the stigma and pollination will occur without the insect knowing.

FERTILIZATION AND FRUIT DEVELOPMENT IN PLANT

Fertilization in plant occurs after pollination, the male sex cell or sperm (male gamete) in the pollen grain unite with the female sex cell, or ovule in the ovary to form seeds (zygote and embryo), which  develop  to form the fruit.

Differences between pollination and fertilization

Pollination Fertilization
It is the transfer of male part into the female part. It is the union of the male gamete and female gamete.
It occurs outside the plant It occurs inside the plant
Agents are needed for pollination to occur Fertilization occur without  any agent

INSTRUCTIONAL PROCEDURE

  • The Teacher revises the previous lesson (The human body (skeletal system)).
  • The Teacher introduces the lesson through question and answer (REPRODUCTION IN PLANTS).
  • The Teacher explains the lessons.
  • The Teacher write the note on the board.

LEARNERS ACTIVITIES

Learners participate in the class discussion

LESSON EVALUATION

Teacher ask the learners to:

  • Draw and Identify the part of a flower.
  • State the functions of parts of a flower.
  • What is pollination
  • What is fertilization in plants?
  • Explain the type and agent of pollination
  • Identify parts of a flower that are concerned with pollination and fertilization.
  • Distinguish between pollination and fertilization.
  • Describe stages of development from flowers to fruit

CONCLUSION: the teacher summarize the lesson.

PREVIOUS LESSON: The Human Body

NEXT LESSON: WATER CYCLE AND RAIN FORMATION

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