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-A science project completed by Vineeth Sam Sekharan, who also goes by the name of Wimbeldon Green.

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  1. 1. By: Vineeth Sam Sekharan 8H Characteristic Of Living Things Assignment
  2. 2. Sunflowers Are: <ul><li>an annual herb plant </li></ul><ul><li>natively found in South America and parts of Central America </li></ul><ul><li>a perennial plant (a plant that lives for two or more years ) </li></ul>Sunflower - any of various composite plants of the genus Helianthus, as H. annuus. Amusing Fact : The scientific name of sunflowers is Helianthus, Helia for sun and Anthus for flower.
  3. 3. Basic Needs of a Sunflower Plant <ul><li>full sun </li></ul><ul><li>an open space where a supply of carbon dioxide exists </li></ul><ul><li>water </li></ul><ul><li>mulch </li></ul><ul><li>(not </li></ul><ul><li>necessarily </li></ul><ul><li>a basic need but increases chances of survival) </li></ul><ul><li>nutrients from soil </li></ul>The sunflower is not one flower, but a cluster of more than 2000 tiny flowers growing together. Amusing Fact: Sunflower was a common crop among American Indian tribes throughout North America.
  4. 4. The Growth of a Sunflower <ul><li>sunflowers grow in drained soil </li></ul><ul><li>sunflowers have roots that can be 1.5 meters into the soil </li></ul><ul><li>the height of a sunflower ranges from 3-5 meters </li></ul><ul><li>these plants live for a year at the most because a sunflower that starts growing in spring will die in the following fall </li></ul>Amusing Fact: A sunflower’s head can grow to be as big as 2 feet across and the plant can be as tall as 18 feet.
  5. 5. Nutrition <ul><li>sunflowers ‘eat’ through photosynthesis </li></ul><ul><li>happens only when they have a light source </li></ul><ul><li>also need nutrients from the soil, and water to survive </li></ul>6H 2 O + 6CO 2 ----------> C 6 H 12 O 6 + 6O -the process by which the sunflower (and most other plants) use the energy from sunlight to create sugar. Amusing Fact: The tallest sunflower grown on record was 25 feet tall in the Netherlands.
  6. 6. Sunflower Excretion <ul><li>plant cells have large vacuoles, and these can be used for storage of waste </li></ul><ul><li>also store the waste in parts of the sunflower that are going to fall off </li></ul><ul><li>oxygen is a waste product of photosynthesis </li></ul><ul><li>carbon dioxide is a waste product of respiration </li></ul><ul><li>water is a waste product of photorespiration and photosynthesis </li></ul>Vacuoles- A small cavity in the cytoplasm of a cell, bound by a single membrane and containing water, food, or metabolic waste. Amusing Fact : Sunflowers are believed to have first originated in Europe in the early 1500s.
  7. 7. Photorespiration <ul><li>undoes most of the work of photosynthesis </li></ul><ul><li>often thought of as the opposite of photosynthesis </li></ul><ul><li>when sunflowers take in oxygen and take out carbon dioxide </li></ul><ul><li>transports minerals between cells </li></ul><ul><li>uses 50%-75% of the energy that is produced in photosynthesis </li></ul><ul><li>all the carbon sunflowers create through photorespiration is approximately three tons (yearly figure) </li></ul>Respire - breathe easily again, as after exertion or anxiety
  8. 8. Reproduction of a Sunflower <ul><li>reproduce through seeds </li></ul><ul><li>seeds go through pollination </li></ul><ul><li>bees are the primary pollinating agents </li></ul><ul><li>other pollinating agents are insects </li></ul><ul><li>(ex. moths) </li></ul><ul><li>reproduction can be describe as asexual </li></ul><ul><li>the pollen contains sperm that fertilizes eggs in female parts of the plant </li></ul>Pollen Pollination -process by which plant pollen is transferred from the male reproductive organs to the female reproductive organs to form seeds. Amusing Fact : The sunflower is the national flower of Russia.
  9. 9. (continued) Amusing Fact : It requires only 90 to 100 days from planting to maturity.
  10. 10. (continued) Amusing Fact: Sunflowers can grow 8 to 12 feet tall in rich soil within six months.
  11. 11. Response and Adaptations <ul><li>evolved to have tough skins and fuzzy bristles </li></ul><ul><li>create an abundant amount of seeds and rely on pollination to ensure survival (for more information on reproduction go to sixth, and seventh slide) </li></ul><ul><li>these plants have adapted to grow in a variety of climates </li></ul><ul><li>sunflowers also grow well in many soils, from sand to clay </li></ul><ul><li>can be bred to change characteristics </li></ul><ul><li>do not adapt to environment, except through evolution </li></ul>Amusing Fact: Sunflowers have been cultivated for over 8000 years.
  12. 12. Movement of a Sunflower <ul><li>move from place to place as seeds (see reproduction slide) </li></ul><ul><li>when blown in the wind </li></ul><ul><li>sunflowers are popularly known to move towards the sun  this is called solar tracking, or heliotropism </li></ul>Heliotropism - Growth or orientation of a plant, toward or away from the light of the sun. Amusing Fact: Sunflowers are one of the world’s most cultivated cash crops.
  13. 13. Extinction? <ul><li>a few species of sunflower have already become extinct and some are endangered </li></ul><ul><li> due to loss of habitat </li></ul><ul><li>the extinction of bees and insects that pollinate will lead to extinction </li></ul><ul><li>all sunflowers becoming extinct because of loss of habitat is unlikely, as they can grow in many climates and soils </li></ul><ul><li>humans cultivate the sunflower, unlikely for it to go extinct </li></ul>Amusing Fact: Scientists agree that the sunflower will not die out within the next century.
  14. 14. Picture Credits <ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>Thank You for Reading My Presentation
  15. 15. <ul><li>&quot; Sunflower ,&quot; Microsoft® Encarta® Online Encyclopedia 2007 © 1997-2007 Microsoft Corporation. All Rights Reserved. </li></ul><ul><li>McDonald, Mary Ann. Sunflowers . Plymouth, MN: Child’s World, c1997. </li></ul><ul><li>Why Do Sunflowers Face the Sun?: Questions Children Ask About Nature . New York: DK Pub., 1996 </li></ul><ul><li>MacGregor, Miles. The Sunflower . Kansas City, MO: Landmark, 1994. </li></ul><ul><li>Ford, Miela. Sunflower . New York: Greenwillow Books, 1995. </li></ul><ul><li>Dieckmann, Marliese. The Sunflower . Niwot, CO: Roberts Rinehart, (1994), 1981. </li></ul><ul><li>&quot;Biology of Plants : Making Food.&quot; MBGNet. 13 Feb. 2008 <>. </li></ul>Bibliography Thank You for Reading My Presentation