Questions 1- Choose: Relation which means eating at same table is called ............ in which one symbiont get benefits and cause no harm to host. A- Commensalism b- Mutualism c- parasitism/pathogenism 2- Choose: Relation in which benefit exchangement between symbiont and its host is called ...................... A- Commensalism b- Mutualism c- parasitism/pathogenism 3- Choose: Relation in which one symbiont get benefit at the expense of the host causing morbidity and sometimes mortality is called ............... A- Commensalism b- Mutualism c- parasitism/pathogenism 4- Define the followings: Facultative, opportunistic, Accidental (incidental), erratic (or aberrant). 5- Mycology is the branch of science which deals with ........................ 6- Phycology is the branch of science which deals with ........................ 7- Syphilis is a disease transmitted by ...................... 8- Vertical transmission is defined as .......................................... 9- Iatrogenic transmission is defined as .............................. 10- Compare between six kingdoms of life in the point of view of cell types, cell structures, number of cells. 11- Compare between prokaryotes & Eukaryotes. 12- T or F: Nuclear material of prokaryotes is surrounded by nuclear membrane while it is not surrounded in eukaryotes. 13- T or F: Viruses are considered as prokaryotes. 14- T or F: Prokaryotes and eukaryotes have many chromosomes. 15- One micrometers equals .............. Centimeter. 16- One nanometer equals ............ Micrometer, ............ Millimeters, ................ Centimeters. 17- Differentiate between Scanning and transmission electron microscopy. 18- T or F: Abbreviation of species is sp. for single organism and spp. for subspecies. 19- Normal flora is defined as ......................... 20- Human microbiome is defined as ..................... 21- Skin consisted of 3 different layers.........., ............, and ............ 22- Microbiome barrier secretes ................ to help in skin defense mechanism. 23- Keratinocytes is differentiated into corneocytes which represent ............... 24- Immune cells in dermis secretes ................... & .................... Tears contain ................. enzyme which has antimicrobial activity. 25- Teeth can be colonized by ............. which cause ............... which is one of the major causes for .............. and ................ 26- S. mutans can enter the bloodstream following dental surgery and colonize damaged or prosthetic heart valves causing ....................... 27- S. pneumoniae found in the nasopharynx of many healthy individuals can cause .................... 28- The minimum number of normal flora per one gram of contents in intestinal tract is present in stomach due to the presence of ............. & .......... while the maximum number is present in .......... 29- Low pH of vagina is due presence of ............... species that in antibiotic therapy, pH rise and causes overgrowth of fungus such as ............. causing inflammations and ulcers.