New Update 2025 BIO 207 exam 1 umich
EXAM QUESTIONS AND ANSWERS 100%
SOLVED
What is a microorganism (microbe)? - Correct Answers ✅- microscopic unicellular organisms -not just bacterial -exist in all 3 domains (eukaryotic, bacteria, archaea) -viruses also considered microbes eukaryotes - Correct Answers ✅-moist or aquatic environments -protista -contain membrane-bound organelles -DNA enclosed in a membrane-bound nucleus -cells are generally larger and more complex -18S rRNA Prokaryotes - Correct Answers ✅-no nucleus -diverse environments, in & on us -generally smaller than eukaryotic cells -16S rRNA Genetic diversity on earth - Correct Answers ✅the overwhelming proportion of genetic diversity is encoded by microbes 1 / 4
New Update 2025 BIO 207 exam 1 umich
EXAM QUESTIONS AND ANSWERS 100%
SOLVED
archaea - Correct Answers ✅-have a mixture of eukaryotic and bacterial features
-phenotypic features that distinguish them from bacteria:
cell walls-different amino acids & sugars than those of bacteria cell membranes-chemically distinct from bacterial membranes w differing lipid structures and chemical links -are extremophiles mycology - Correct Answers ✅-study of fungi -eukaryotic microbes (>100,000 species) -cell walls contain chitin (acetylated amino-polysaccharide super strong) -membranes contain ergostrerol (target of some anti-fungal drugs) Unicellular (yeast) and multicellular (molds/mycelial) Yeasts - Correct Answers ✅-unicellular fungi -saccaromyces cerevisiae (bakers/brewers yeast) -candida albicans (yeast infections) -reproduce by budding 2 / 4
New Update 2025 BIO 207 exam 1 umich
EXAM QUESTIONS AND ANSWERS 100%
SOLVED
molds - Correct Answers ✅-mycelial (multicellular) masses
-hyphae: multinucleate cell filaments which extend & form
branches, generating a mycelium (septate - multiple cells w septa dividing cytoplasms coenocytic - one long cell w many nuclei) types of hyphae mycelia, mushrooms & mycorrhizae - Correct Answers
✅diff fungi forms:
-the familiar mushrooms -mycelia of pathogens -symbiotic partners of algae in lichens major clades of fungi - Correct Answers ✅-chytridiomycota -zygomycota -ascomycota (bakers yeast) -basidiomycota (mushrooms) lifecycle of basidiomycota - Correct Answers ✅ mycorrhizae - Correct Answers ✅myco = fungus, rhiza = root -symbiotic association between plant roots & fungi 3 / 4
New Update 2025 BIO 207 exam 1 umich
EXAM QUESTIONS AND ANSWERS 100%
SOLVED
-two common types: endomycorrhizae (penetrate cell wall of
plant root cells), ectomycorrhizae (do not) benefits of symbiosis between mycorrhizae - Correct
Answers ✅benefits to fungus: plants provide a source of
carbohydrates to the fungus from photosynthesis
benefits to plant: fungi provide increased mineral nutrients
(extend the volume of soil accessible) fungi improve a plants access to water - more draught tolerant algae - Correct Answers ✅photosynthetic eukaryotic organisms. contain chlorophyll.algae not necessarily related -unicellular microalgae (diatomes) -multicellular chains (giant kelp) -brown algae
ecology:
-mostly aquatic -water necessary for physical support, reproduction, diffusion of nutrients
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