Name EXERCISE 13 Bacteria and Protists Section Number POST-LAB QUESTIONS Introdu

Question

Name EXERCISE 13 Bacteria and Protists Section Number POST-LAB QUESTIONS Introduction 1. What major characteristic distinguishes bacteria from protists? 13.1A Bacteria 2 What form of bacterium is shown in this photomicrograph? (1100x) 13.2A Phylum Stramenopila t, environ- While the organism that resulted in the Irish potato famine of 1845-1847 had long been mental 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 3. 13.2B Phylum Amoebozoa Thisphotomcgph dtied iving specimers in was taken from a prepared s lide of a stained specimen. You lab·Describe the mechanism by which it moves from place to place 5. What is phagocytosis? What function does it serve? (425x) Bacteria and Protists 23

Explanation / Answer

Bacteria are prokaryotic whereas protists are eukaryotic. Gram negative Spirillum Ireland was too dependent on the potatoes those days, and the fungus requires cool and moist weather to thrive, a strain of Phytophthora arrived accidentally from North America and Ireland had a prolonged rainy period pattern during the summer of 1845, once the fungus takes hold of the plant, it spreads quickly. Firstly it acts like a parasite and gets its food supply from the plant. Then it increases rapidly and become a pathogen, causing disease and massive losses. Amoeboid movement is the most common mode of locomotion in eukaryotic cells. It is a crawling-like type of movement done by protrusion of cytoplasm of the cell involving the formation of pseudopodia or false feet and posterior uropods. Phagocytosis literally means phagein = to engulf, cyt = cell osis = process means the process of engulfing cells. This process is used by: Immune system, where phagocytes such as monocytes and neutrophils engulf antigens. And amoeba use this to feed themselves, also this process is used in Apoptosis (in case of cell death)

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