Life Cycles - Plants
Dandelions disperse their seeds by wind.

Life Cycles - Plants

Life cycles is one of the topics covered in KS2 Science and understanding them is an important part of life. This is the second of two quizzes on the topic and it looks in particular at the life cycles of plants, from seeds to dispersal.

The life cycles of plants are the stages from seed to dispersal. In flowering plants the cycle goes like this: seeds in the soil germinate. They then grow roots and shoots. The next stage is a seedling which matures into an adult plant and makes flowers. Then the plant makes fruit which itself contains seeds. These are spread through dispersal and the cycle starts again. Did you know that some trees have lived for hundreds, or even thousands of years? One yew tree in Llangernyw, Wales, is believed to be at least 4,000 years old! Other plants, such as cress, only live for a few weeks.

Take this quiz on plant life cycles to see how much you know.

Which of the following is true?
All plants grow from seeds
All plants have flowers
All plants can reproduce
All plants have fruit
All plants reproduce, but not all plants reproduce by flowering 
Which of the following words describes the moment a seed begins to grow?
Seeds need certain conditions before they can germinate
Why do plants need sunlight?
Plants use sunlight to make food
Sunlight makes plants warm
Sunlight allows plants to flower
Sunlight keeps plants from getting too wet
Although seeds can germinate without sunlight, plants need it to make their food, using a process called photosynthesis
What is dispersal?
The ripening of a seed pod
The method by which a plant spreads its seeds
The transfer of pollen to the stigma
The length of time it takes a seed to germinate
Plants have several methods of dispersing seeds - by wind, by explosion, by animal, even by water - coconut palms can disperse their seeds (coconuts) by sea
Which part of a flowering plant is male?
The stamen produces pollen
What happens if seeds are planted too closely together?
None of the seeds will grow
The young plants struggle to compete for moisture and nutrients
Only one seed will grow
The young plants will be healthier
Plants need space to spread their roots and stems
Flowering plants produce many seeds which never grow. Why do they do this?
Because many of the seeds are defective
Because some of the seeds will not have enough soil to germinate
Because many of the seeds will be eaten by animals, blown away by the wind, or washed away
Because some seeds will not receive enough food to survive
The more seeds a plant produces, the better its chance of reproducing
What do seeds need in order to germinate?
Water and soil
Sunlight and soil
Water and warmth
Sunlight and warmth
Seeds can germinate without light or soil, but cannot germinate in a cold, dry place
Which part of a flowering plant grows into a fruit?
The fertilised ovary, containing seeds, develops into a fruit
Which of the following plants disperses its seeds by wind?
Beech trees
Apple trees
Have you ever blown the seeds from a dandelion clock?
You can find more about this topic by visiting BBC Bitesize - What are the stages of a plant's life cycle?

Author:  Sheri Smith

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