Difference between revisions of "AY Honors/Flowers - Advanced/Answer Key"
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===Monoecious and Dioecious=== | ===Monoecious and Dioecious=== | ||
[[Image:Hollyflowers.jpg|300px|right|thumb|Holly (''Ilex aquifolium'') is dioecious: (above) shoot with flowers from male plant; (top right) male flower enlarged, showing stamens with pollen and reduced, sterile stigma; (below) shoot with flowers from female plant; (lower right) female flower enlarged, showing stigma <br>and reduced, sterile stamens with no pollen]] | [[Image:Hollyflowers.jpg|300px|right|thumb|Holly (''Ilex aquifolium'') is dioecious: (above) shoot with flowers from male plant; (top right) male flower enlarged, showing stamens with pollen and reduced, sterile stigma; (below) shoot with flowers from female plant; (lower right) female flower enlarged, showing stigma <br>and reduced, sterile stamens with no pollen]] | ||
| − | A monoecious plant is one that possesses | + | A monoecious plant is one that possesses both male and female unisexual flowers on the same plant; from Greek for "one household". Individuals bearing flowers of both sexes at the same time are called ''simultaneously monoecious''. Individuals that bear only flowers of a single sex at one time are called ''consecutively monoecious''. |
| − | A dioecious plant is one in which the male and female flowers occur on different individuals; from Greek for "two households". | + | A dioecious plant is one in which the male and female unisexual flowers occur on different individuals; from Greek for "two households". |
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Revision as of 14:41, 1 August 2007
1. Have the Flower Honor.
2. Photograph, collect pictures of or sketch 75 species of flowers. Make a scrapbook from these and correctly label each flower.
3. Give the distinguishing characteristics of the flowers of each of the 12 common plant families.
Adventist Youth Honors Answer Book/Flower families
4. Prove ability to use plant keys to genus and species.
5. Tell the difference between perfect and imperfect flowers. What is meant by pistillate and staminate flowers? Give an example of monoecious and dioecious plants. Tell the difference between monocotyledons and dicotyledons.
Perfect and Imperfect
The terms perfect and imperfect as pertaining to flowers relates to their sexuality. Flowers are the sexual organs of a plant, and they may contain male (stamens), female (pistils), or both parts. A plant is said to be perfect if it possesses both male and female equivalent parts. If a flower has only male, or only female structures, it is said to be imperfect.
Pistillate and Staminate
A flower is pistillate if it possesses only pistils, which are a plant's female reproductive structures. If it possesses only stamens (the male reproductive structures), it is called staminate.
Monoecious and Dioecious
and reduced, sterile stamens with no pollen
A monoecious plant is one that possesses both male and female unisexual flowers on the same plant; from Greek for "one household". Individuals bearing flowers of both sexes at the same time are called simultaneously monoecious. Individuals that bear only flowers of a single sex at one time are called consecutively monoecious.
A dioecious plant is one in which the male and female unisexual flowers occur on different individuals; from Greek for "two households".
