Unformatted text preview: Fruit wall and one cotyledon removed (a) fruit wall splits and radicle emerges hypocotyl root hairs hypocotyl cotyledons plumule lateral roots root hairs (b) hypocotyl elongates and draws cotyledons from the fruit wall. Often the fruit wall is carried out of the soil with the cotyledons. It falls off when the cotyledons expand (c) cotyledons are brought above the soil. The ‘arching’ of the hypocotyl draws the cotyledons backwards through the soil, protecting the plumule from damage . (d) the cotyledons open out, exposing the plumule 4 Sunflower © D.G. Mackean...
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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