Lab 5: Microbial Diversity Flashcards
What are the three domains of life?
- Bacteria
- Archaea
- Eukarya
Which two of those domains consist of only unicellular organisms?
Archaea and bacteria
Which two of thos domains consist of prokaryotic organisms?
Archaea and bacteria
If you discovered a single-celled, prokaryotic organism living in the waters of a hot spring, then in which of the three domains of life would this organism probably be classified?
Archaea
Which are generally more complex: eukaryotic cells or prokaryotic cells?
Eukaryotic
Bacteria are said to be ubiquitouis. what does that mean?
They are found everywhere
Bacteria can be classified as aerobic, anaerobic, or facultative, based on their oxygen needs. Bacteria that can make their ATP through aerobic respiration pathways would belong to which category (or categories)?
Aerobic and Facultative
Bacteria can be classified as autotrophs or heterotrophs, based on how they obtain the carbon atoms they need for producing organic m olecules. Bacteria that get thier cabon atoms by breaking down the nutrients in you blood cells would belong to which category?
Heterotrophs
Why must bacteria be stained before they are viewed under the microscope?
They are practically invisible.
Which of the three basic shapes is represented by the organism in the photograph (round)?
Coccus
Amoebazoans are:
- characterized by pseudopods
- heterotrophic
Diplomonads are:
- characterized by having two equal sized nuclei per cell, multiple flagella, and parasitic lifestyle
- Have no mitochondrial DNA
- Are anaerobic
Alveoates are:
- have a characteristic membrane-bound sac(aveoli)
- Apicomplexans
- Ciliates
- Dinoflagellates
Name an apicomplexan Alveolate?
Plasmodium
Name a Ciliate Alveolate?
Parmecium
What is a distinguishable characteristic displayed by Ciliates?
they have two nuclei
- macronuclei
- micronuclei
What is an example of dinoflagellates?
The red tides
Stramenophiles are characterized by;
long flagellum with many hairy projections( Straw hair) usually a 2nd flagella
What are two types of stramenophiles?
- Brown Algea (Kelp, seaweed)
- Diatoms
What is significant about brown algea?
- largest and most complex among protists
- generally found in marine habitat
- multicellular
- brown color comes from photosynthetic pigments in their chloroplast
What are four unique characteristics about Diatoms?
- unicellular
- cell walls made of silica
- in fresh & marine waters
- generate lots of Oxygen in the atmosphere
What are Protozoans?
heterotrophic protists that get nutrition by eating bacteria and smaller protists.
What is an apical complex?
a complex of organelles at the apex of the infectious cell that specializes in penetrating host cells.
Ciliates have:
Macro and Micro Nucleus
What is an oral grove?
a ciliated indentation on the body that directs food toward the mouth
What is a contracile Vacuole?
Star shaped (clear bubbles) organelle that functions like buckets to bail out excess water from the cell. -Paramecium have two vacuoles. One on each end.
