question e Laboratory A. Com, bean and pea seedlings at various B U Procedures-A
ID: 213049 • Letter: Q
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question e
Laboratory A. Com, bean and pea seedlings at various B U Procedures-Angiospe s of development are available in the lab ted next to the seedings (and shown below), note the three ways that emerge from the soil Answer the questions in tD seedlings may piece of paper and put it in your lab note seedlings, the first structure that germinates is the radicle C. Note that in all three o. The bean and the pea are eudicots. How many cotyledons do they have? What structure emerges from the soil in the bean? What happens to the cotyledons of the bean as the seedline develops? What structure emerges from of the pea? How is the fragile seedling protected from damage as it emerges from the soil? the soil in the pea? What happens to the cotyledons Corn is a monocot. What structure emerges from the soil in corn. How does this structure protect the seedling from damage? E. Observe the foliage leaves in the older seedlings. How does the pattern of the veins differ between monocot and eudicots? F. Foliage leaves Hypocotyldon Cotyle don Seed coat (a) Bean Foliage leaves Foliage leaves Hypocotyl Epicotyl Coleoptile Coleoptile Radicle (b) Pea Radicle (c) Corn Lab #7-Page 8Explanation / Answer
Corn is monocot and it do not have two cotyledons. It only have single coat and the one side of it involved in the germination of radical and coleoptile.
Radical and coleoptile structures are germinated from the seed of corn. Radicle furtger develops and differentiate into root structures.
Coleoptiles or another structures which shows negative geotropism and develops more for the formation of stem.
The seedling of course is thicker and more protective for prevention from damage. instead of dicots the germinating tissues are covered from one side by a thick cocering of corn.
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