BIOS242 final Chamberlain Exam Questions And Answers BIOS242 final Chamberlain Exam Questions And Answers

BIOS242 final Chamberlain Exam Questions And Answers 4 important facts about Antoni van Leeuwenhoek (Dutch) - ANS -First person to see protozoa and bacteria -Began making and using simple microscopes -Often made a new microscope for each specimen -Examined water and visualized tiny animals, fungi, algae, and single-celled protozoa; "animalcules 2 important facts about Carolus Linnaeus - ANS -developed taxonomic system for naming plants and animals and grouping similar organisms together -Leeuwenhoek's microorganisms grouped into six categories as follows: ◦Fungi ◦Protozoa ◦Algae ◦Bacteria ◦Archaea ◦Small multicellular animals Describe 2 important contributions of Pasteur - ANS -Developed germ theory of disease -His experiment: ◦Swan neck flasks were used:: allowed for airflow without allowing the introduction of environmental microbes ◦When the "swan-necked" flasks remained upright, no microbial growth appeared ◦When the flask was tilted, dust from the bend in the neck seeped back into the flask and made the infusion cloudy with microbes within a day What are prokaryotes, and what are the characteristics of them? - ANS -Archaea and bacteria. -Characteristics: no membrane surrounding DNA, no nucleus, no membrane bound organelles, smaller than eukaryotes What are eukaryotes, and what are the characteristics of them? - ANS -algae, protozoa, fungi, microanimals -Acellular Infectious Agents: viruses, viroids, prions. -Characteritics: have membrane surrounding DNA, have nucleus, have membrane bound organelles, larger than prokaryotes What are archaea & bacteria, and what are the characteristics of them? - ANS - Unicellular, lack nuclei, smaller than eukaryotes, ubiquitous (everywhere), asexual -bacteria cell walls contain peptidoglycan -archaea cell walls composed of polymers, NOT peptidoglycan What is fungi, and what are the characteristics? - ANS -Eukaryotic, obtain food from other organisms, has cell wall, plays role in fermentation -Mold: multicellular, long filaments called hyphae, sexual & asexual -Yeast: unicellular, asexual by budding, creates bread wine & beer through fermentation