Difference between revisions of "AY Honors/Grasses/Answer Key"
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| − | {{honor_header|3|1945|Nature | + | {{honor_header|3|1945|Nature|General Conference}} |
==1. What characteristics must a plant have to qualify as a grass?== | ==1. What characteristics must a plant have to qualify as a grass?== | ||
==2. What kind of roots do all grasses have?== | ==2. What kind of roots do all grasses have?== | ||
| − | ==3. About how many species around the world are there in the grass family called Gramineae or Poaceae?== | + | ==3. About how many species around the world are there in the grass family called Gramineae or Poaceae?== |
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| + | :The '''[[W:Poaceae|Poaceae]]''' is also known as the '''[[W:Gramineae|Gramineae]]'''. There are about 600 genera and between 9,000 to 10,000 species of these plants. Plant communities dominated by Poaceae are called grasslands; it is estimated that grasslands comprise 20% of the vegetation cover of the earth. This family is the most important of all plant families to human economies: it includes the staple food grains grown around the world, lawn and forage grasses, and bamboo, widely used for construction throughout Asia. | ||
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==4. Do the seeds of grasses have two halves as does the bean (a dicotyledon), or does the seed consist of just one part as do the lily, date, and coconut (monocotyledons)?== | ==4. Do the seeds of grasses have two halves as does the bean (a dicotyledon), or does the seed consist of just one part as do the lily, date, and coconut (monocotyledons)?== | ||
==5. What unique characteristic in the growth of grass leaves makes it possible for the plant to flourish even though continually mowed or grazed?== | ==5. What unique characteristic in the growth of grass leaves makes it possible for the plant to flourish even though continually mowed or grazed?== | ||
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==10. Press or dry, mount, and correctly label the flower stalks or seed stalks of five pestiferous grasses that are commonly considered to be weeds.== | ==10. Press or dry, mount, and correctly label the flower stalks or seed stalks of five pestiferous grasses that are commonly considered to be weeds.== | ||
==11. In addition to your collection of flower or seed stalks of pestiferous kinds, press, mount, and correctly name the flower stalks or seed stalks of ten additional grasses that grow in your neighborhood. This collection may include some of the plants whose seeds are in your collection of cultivated grasses.== | ==11. In addition to your collection of flower or seed stalks of pestiferous kinds, press, mount, and correctly name the flower stalks or seed stalks of ten additional grasses that grow in your neighborhood. This collection may include some of the plants whose seeds are in your collection of cultivated grasses.== | ||
| − | + | ==References== | |
| − | + | [[Category:Adventist Youth Honors Answer Book|{{SUBPAGENAME}}]] | |
| − | [[Category:Adventist Youth Honors Answer Book]] | ||
Revision as of 00:56, 4 October 2007
1. What characteristics must a plant have to qualify as a grass?
2. What kind of roots do all grasses have?
3. About how many species around the world are there in the grass family called Gramineae or Poaceae?
- The Poaceae is also known as the Gramineae. There are about 600 genera and between 9,000 to 10,000 species of these plants. Plant communities dominated by Poaceae are called grasslands; it is estimated that grasslands comprise 20% of the vegetation cover of the earth. This family is the most important of all plant families to human economies: it includes the staple food grains grown around the world, lawn and forage grasses, and bamboo, widely used for construction throughout Asia.
