organism 1 4.2.c. Phylum Alveolata The scanning electron micrograph on the right
ID: 214567 • Letter: O
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organism 1 4.2.c. Phylum Alveolata The scanning electron micrograph on the right contains two organisms in the phylum. What are the structures at the end of the arrow? 5. organism 2 4.2.D. Phylum Stramenopila structures appear here, but you have seen one very similar to it. What are the circular structures in the photo? 6. You've never seen the protistan whose sexual (287x) 7. While the organism that resulted in the Irish potato famine of 1845-1847 had long been present, environmental conditions that occurred during this period resulted in the destructive explosion of disease. Indicate what those environmental conditions were and why they resulted in a major disease outbreak. While walking along the beach at Point Lobos, Cali- fornia, the fellow pictured walks up to you with alga in hand. Figuring you to be a college student who has probably had a good introductory biology course, he asks if you know what it is. (a) What is the cell wall component of the organism . that has commercial value? (b) Name three uses for that cell wall component. (425x)Explanation / Answer
4.2 c -Alveoli-sacs present under plasmamembrane.
4.2 d - Oogonia and Antheridia
7-Irish potato famine is caused by the watermold Phytophthera infestans.It caused blight in potato plants where tubers ,roots and leaves are destroyed.this potato famine killed over a million people and many migrated .over dependence on potato and poverty made the famine worse.A heavy dependence on one or two yielding varieties reduced the genetic variety and extremely cool moist weather where blight survived.
8 - a ) Matrix polysaccharides ex- carrageenan, agar.
b) Carragenans are used for gelling ,thickening and stabilizing in food industry.
Agar is used in preparation of desserts ,as a solid substrate in microbiological labs,laxative,appatite supressant ,soup thichener,clarifying agent in brewing and for sizing paper and fabrics.
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