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Life Cycle of a Plant KS2

Explore the life cycle of plants, from seed to growth and reproduction, and find clear, ready-to-teach KS2 activities to help your pupils understand this key science concept with confidence.

In the lesson:

In this 'Life Cycles of Plants' KS2 Science lesson, your Year 5 children will build on their previous learning by finding out in detail about the functions of the parts of a flower, including how reproduction occurs through pollination and germination.

The slideshow for the teaching input provides some in-depth information about the process of sexual reproduction in plants. During their independent learning activities, your class can then either label the parts of flowering plants, or explore these parts for themselves by dissecting flowers.

This KS2 Science lesson comes fully prepared and ready for you to deliver to your class. There's a detailed lesson plan with three-way differentiation plus an alternative activity, a slideshow for the teaching input and a range of printable teaching resources.

What's included:
  • Lesson plan
  • Slides
  • Differentiated worksheets
  • Dissecting Flowers sheet
View the Lesson
PlanBee

Life Cycle of a Plant KS2

What is the purpose of a flower in the life cycle of a plant?

The flower is the reproductive part of the plant. In a flower, pollen grains and egg cells combine and grow into seeds. This process is called pollination.

Flowers contain both male and female reproductive parts:

  • The male part of the flower (the anther and filament) is called the stamen.
  • The female part of the flower (the stigma, style and ovary) is called the carpel.
 
Male and female parts of a flower | KS2 Life Cycles

The parts of a flower

How do plants reproduce sexually?

Flowering plants reproduce sexually by a process called pollination. Insects, attracted by the flower's petals, land on the flower and drink its nectar. Pollen from the anthers sticks to the insect's body. Most flowering plants rely on insects to carry out pollination, but the pollen grains of some plants are carried by the wind, water or other animals. Many flowering plants can even pollinate themselves!

When the insect lands on another flower, the pollen grains on its body stick to the stigma. The pollen grains are the male sex cells. They contain genetic information.

Pollen tubes grow down the style to the ovary. The genetic information from the pollen combines with a female egg cell. This is called fertilisation. A seed starts to grow...

As the seed grows, the ovary swells and the petals drop off the flower. The ovary becomes a fruit with the seeds inside.

The fruit then either falls to the ground or is eaten by animals. The seeds can then either be scattered by animals or the wind. This process is known as seed dispersal.

Some of these seeds then get buried in the soil so that new plants can grow. The process by which a plant begins to grow from a seed is called germination.  

 
Life Cycle of a Plant KS2

The life cycle of a lemon tree

How do plants reproduce asexually?

Some plants can reproduce aseually by themselves, meaning that only one parent plant is needed. It can produce a new plant all by itself.

Some plants, such as crocuses and potatoes, grow stores of food under the ground called bulbs and tubers. These types of plant reproduce asexually by growing new plants off their bulbs and tubers.

 

How do plants reproduce asexually?

Some plants can reproduce aseually by themselves, meaning that only one parent plant is needed. It can produce a new plant all by itself.

Some plants, such as crocuses and potatoes, grow stores of food under the ground called bulbs and tubers. These types of plant reproduce asexually by growing new plants off their bulbs and tubers.

 
Potatoes can grow asexually | Plant Life Cycles

A potato plant can reproduce asexually

Other plants reproduce asexually by producing side branches or shoots (called runners) carrying new ‘plantlets’ on the ends. These runners grow away from the plant; the new plantlet grows into the soil.

 
Asexual reproduction in a strawberry plant

A strawberry plant reproduces asexually by producing runners that grow away from the plant

When plants reproduce asexually, the children plants are genetically identical to the parent. They are clones of the parent plant.

 
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