BIOL 2420 EXAM #1 QUESTIONS AND 100% CORRECT VERIFIED ANSWERS UPDATED FOR
2025/2026 GRADED A+ GUARANTEED 100% PASS
Microbes - (answer)minute living things that are too small to be seen with the unaided eye; include
bacteria, fungi, protozoa, microscopic algae, and viruses
Benefits of Microogranisms - (answer)basis of food chains in marine & freshwater environments;
decomposers; important role in photosynthesis; digestion in human intestine; synthesis of Vitamin B
and Vitamin K; synthesize food & alcohol
Pathogenic - (answer)disease producing
Bacteria - (answer)Unicellular prokaryotic organisms; enclosed in cell walls composed of peptidoglycan;
generally reproduce by binary fission; swim using flagella
Archaea - (answer)Prokaryotic organisms with cell walls that lack peptidoglycan (if they have them);
found in extreme environments;
3 Main Groups:
-Methanogens
-Extreme Halophiles
-Extreme Thermophiles
Do not cause disease in humans
Methanogens - (answer)type of Archaea that produce methane as a waste product from respiration
Extreme Halophiles - (answer)type of Archaea that live in extremely salty environments
Extreme Thermophiles - (answer)type of Archaea that live in hot sulfurous water
Fungi - (answer)Eukaryotic organisms that can be uni (yeasts) or multicellular; cannot carry out
photosynthesis; cell walls are composed of Chitin; absorb nutrients from solutions of organic material
from their environment; reproduce sexually & asexually
, BIOL 2420 EXAM #1 QUESTIONS AND 100% CORRECT VERIFIED ANSWERS UPDATED FOR
2025/2026 GRADED A+ GUARANTEED 100% PASS
Yeasts - (answer)unicellular form of fungi; oval shaped & larger than bacteria
Molds - (answer)most typical fungi form; form visible masses called mycelia
Mycelia - (answer)visible mass of a mold made of long filaments called hyphae that branch and
intertwine; appear as cottony growths
Protozoa - (answer)Unicellular eukaryotic microbes; move using pseudopods (Amebae), flagella, or cilia;
can live independently or as parasites; can also be photosynthetic; can reproduce sexually or asexually
Algae - (answer)Photosynthetic eukaryotes; can reproduce sexually or asexually; microbiologist
interested in unicellular; cell wall composed of cellulose;
Viruses - (answer)can only be seen with an electron microscope; acellular; contain a core made up of
either DNA or RNA that is surrounded by a protein coat sometimes encased by a lipid membrane
(envelope); can only reproduce using the cellular machinery of other organisms
Helminths - (answer)parasitic flatworms and roundworms; microscopic in size during the early stages of
their lives; eukaryotic
Classification of Microogranisms - (answer)Created by Carl Woese;
Three groups
-Bacteria (cell walls contain peptidoglycan)
-Archaea (cell walls that lack peptidoglycan)
-Eukarya (included Protists; Fungi; Plants; Animals)
Cell Theory - (answer)First discovered by Robert Hooke when he used his microscope to view cells in
cork; theory that all living things are composed of cells
2025/2026 GRADED A+ GUARANTEED 100% PASS
Microbes - (answer)minute living things that are too small to be seen with the unaided eye; include
bacteria, fungi, protozoa, microscopic algae, and viruses
Benefits of Microogranisms - (answer)basis of food chains in marine & freshwater environments;
decomposers; important role in photosynthesis; digestion in human intestine; synthesis of Vitamin B
and Vitamin K; synthesize food & alcohol
Pathogenic - (answer)disease producing
Bacteria - (answer)Unicellular prokaryotic organisms; enclosed in cell walls composed of peptidoglycan;
generally reproduce by binary fission; swim using flagella
Archaea - (answer)Prokaryotic organisms with cell walls that lack peptidoglycan (if they have them);
found in extreme environments;
3 Main Groups:
-Methanogens
-Extreme Halophiles
-Extreme Thermophiles
Do not cause disease in humans
Methanogens - (answer)type of Archaea that produce methane as a waste product from respiration
Extreme Halophiles - (answer)type of Archaea that live in extremely salty environments
Extreme Thermophiles - (answer)type of Archaea that live in hot sulfurous water
Fungi - (answer)Eukaryotic organisms that can be uni (yeasts) or multicellular; cannot carry out
photosynthesis; cell walls are composed of Chitin; absorb nutrients from solutions of organic material
from their environment; reproduce sexually & asexually
, BIOL 2420 EXAM #1 QUESTIONS AND 100% CORRECT VERIFIED ANSWERS UPDATED FOR
2025/2026 GRADED A+ GUARANTEED 100% PASS
Yeasts - (answer)unicellular form of fungi; oval shaped & larger than bacteria
Molds - (answer)most typical fungi form; form visible masses called mycelia
Mycelia - (answer)visible mass of a mold made of long filaments called hyphae that branch and
intertwine; appear as cottony growths
Protozoa - (answer)Unicellular eukaryotic microbes; move using pseudopods (Amebae), flagella, or cilia;
can live independently or as parasites; can also be photosynthetic; can reproduce sexually or asexually
Algae - (answer)Photosynthetic eukaryotes; can reproduce sexually or asexually; microbiologist
interested in unicellular; cell wall composed of cellulose;
Viruses - (answer)can only be seen with an electron microscope; acellular; contain a core made up of
either DNA or RNA that is surrounded by a protein coat sometimes encased by a lipid membrane
(envelope); can only reproduce using the cellular machinery of other organisms
Helminths - (answer)parasitic flatworms and roundworms; microscopic in size during the early stages of
their lives; eukaryotic
Classification of Microogranisms - (answer)Created by Carl Woese;
Three groups
-Bacteria (cell walls contain peptidoglycan)
-Archaea (cell walls that lack peptidoglycan)
-Eukarya (included Protists; Fungi; Plants; Animals)
Cell Theory - (answer)First discovered by Robert Hooke when he used his microscope to view cells in
cork; theory that all living things are composed of cells
