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A Little Bit About Plants

A Little Bit About Plants. Todays Lessons. Differences in Plants Gymnosperms Angiosperms Flowers Looking closer at flowers…. Differences in Plants. A living organism is normally classified as a plant if it produces it’s own food.

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A Little Bit About Plants

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  1. A Little Bit About Plants

  2. Todays Lessons • Differences in Plants • Gymnosperms • Angiosperms • Flowers • Looking closer at flowers…

  3. Differences in Plants • A living organism is normally classified as a plant if it produces it’s own food. • This food is normally created by photosynthesis, in which Carbon Dioxide, Water and Sunlight makes Oxygen and Glucose (sugar). • However, plants reproduce in different ways!!

  4. Gymnosperms • One of the main types of plants are called Gymnosperms. • They reproduce by producing cones (like pine cones). • The cones give off spores from the male pine cone. The spores are also known as pollen (or sperm) • The breeze or wind then carries the spores to the female pine cone. • Now the spores can fertilize the ovule or egg. It’s not called a seed until it’s fertilized. Male pine cone Female pine cone http://biology.clc.uc.edu/courses/bio106/gymnospr.htm

  5. Angiosperms • Angiosperms reproduce through flowers. • Unlike Gymnosperms which have separate male and female cones, flowers contain both the male and female reproductive systems. • The male reproductive system is called the Stamen which contains pollen (or sperm). • The female reproductive system is called the Pistil and includes the ovule (or egg)

  6. Flowers • The pollen (or sperm) of a flower will travel down the Stigma and Style to pollenate the ovule or egg. • Once the egg is fertilized, it will become a seed. • Some seeds will also grow in fruit so that animals will eat the fruit and disperse or move the seed away from the plant.

  7. More on Flowers • To stop the same flower from pollenating themselves, there are some things the different plants do. For example, • The pollen and ovule or egg may be ready at different times • Some ovules or eggs will not accept pollen from the same plant. http://www.flickr.com/photos/powi/3856704220/

  8. A Closer Look At Flowers • Here are some interesting but important facts about flowers: • All fruits and nuts come from flowers. • Flowers are often bright or have a specific smell to attract animals or insects to take their pollen for fertilization. • Many flowers will specialize which means that only one type of insect or animal can pollenate the flower.

  9. Questions • Answer the following questions below in your book in sentences. Remember to include the questions. • What is an Angiosperm and Gymnosperm? Give 2 examples of each. • Briefly describe how Gymnosperms produce seeds. Include a diagram to help explain how it occurs.

  10. Continued • Briefly describe how Angiosperms produce seeds. Include a diagram to help explain how it occurs. • How does the pollen from an Angiosperm get to the egg? • Name at least 5 ways pollen can get from the stamen to the ovule (egg). • EXT: Research what role pollenating flowers has in the fruit industry. What would happen if the flowers were not pollenated?

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