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Introduction
A frog starts off as an egg. After a short time
it has grown into a fully grown frog. Scroll down to see the stages that
frogs go
through and much more.....
Stages of Frog Development
| Age | Picture | Information |
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Egg |
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The female lays eggs in the spring. A group of fertilized eggs is called spawn. |
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Tadpole 7-10 Days |
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They feed on the remaining yolk which is actually in its gut. Their gills, mouth and tail have poorly developed. They begin to swim and feed on algae. |
| 4 Weeks |
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A layer of skin grows over their gills. Little teeth begin to appear. A coiled gut starts to develop This helps them to digest food. |
| 6-9 Weeks |
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Their legs begin to grow and their head is more distinct. They start to eat insects and bulge in their daily diet. Arms begin to grow, elbow first. |
| 12 Weeks |
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It now looks more like a frog, but still has a stubby tail. |
| 20 Weeks |
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They are now fully developed and spending most of their
life out of the water eating a carnivorous diet. Most frogs live
between 4 - 15 years.
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Conclusion
By doing this project the student learned a lot about the stages of a frog's development and states "I still can't believe how a little egg can grow into a fully developed frog in only 20 weeks."
Credits
KESAB Environmental Solutions. A Frog's Life. 21, May, 2002. http://www.cwmb.sa.gov.au/kwc/section3/3-01.htm
National Biological Information Infrastructure, Center for Biological Informatics of the U.S. Geological Survey. "Tadpole Morphing into Frog" [Online image] 21, May, 2002. http://www.frogweb.gov
Steward, David. From Tadpole to Frog. Danbury: Franklin Watts, 1998.
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| Posted by Ashton |
Posted May 30/02 |
