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Unformatted text preview: sometimes for many days. When she lays her eggs, the male releases sperm which fertilises them On contact with the water, a coating of jelly round the eggs swells up and the eggs (spawn) float to the surface. The jelly reduces the chances of the eggs being eaten by predators. jelly layer egg Frog spawn forms clumps Toad spawn forms strings Changes taking place 4-5 days after laying (a) (b) (c) (d) (a) Small sphere consisting of 2 or 3 layers of cells (b) Elongates (c) Tail and head distinguishable (d) External gills forming. Wriggling in the jelly; ready to emerge © D.G. Mackean Newts lay their eggs singly...
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This note was uploaded on 11/29/2011 for the course BIO 218 taught by Professor Young during the Fall '11 term at BYU.
- Fall '11