Lab 5: Microbial Diversity

Question 1

What are the three domains of life?

Answer 1

• Bacteria
• Archaea
• Eukarya

Question 2

Which two of those domains consist of only unicellular organisms?

Answer 2

Archaea and bacteria

Question 3

Which two of thos domains consist of prokaryotic organisms?

Answer 3

Archaea and bacteria

Question 4

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?

Answer 4

Archaea

Question 5

Which are generally more complex: eukaryotic cells or prokaryotic cells?

Answer 5

Eukaryotic

Question 6

Bacteria are said to be ubiquitouis. what does that mean?

Answer 6

They are found everywhere

Question 7

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)?

Answer 7

Aerobic and Facultative

Question 8

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?

Answer 8

Heterotrophs

Question 9

Why must bacteria be stained before they are viewed under the microscope?

Answer 9

They are practically invisible.

Question 10

Which of the three basic shapes is represented by the organism in the photograph (round)?

Answer 10

Coccus

Question 11

Amoebazoans are:

Answer 11

• characterized by pseudopods

- heterotrophic

Question 12

Diplomonads are:

Answer 12

• characterized by having two equal sized nuclei per cell, multiple flagella, and parasitic lifestyle
• Have no mitochondrial DNA
• Are anaerobic

Question 13

Alveoates are:

Answer 13

• have a characteristic membrane-bound sac(aveoli)
• Apicomplexans
• Ciliates
• Dinoflagellates

Question 14

Name an apicomplexan Alveolate?

Answer 14

Plasmodium

Question 15

Name a Ciliate Alveolate?

Answer 15

Parmecium

Question 16

What is a distinguishable characteristic displayed by Ciliates?

Answer 16

they have two nuclei

• macronuclei
• micronuclei

Question 17

What is an example of dinoflagellates?

Answer 17

The red tides

Question 18

Stramenophiles are characterized by;

Answer 18

long flagellum with many hairy projections( Straw hair) usually a 2nd flagella

Question 19

What are two types of stramenophiles?

Answer 19

• Brown Algea (Kelp, seaweed)

- Diatoms

Question 20

What is significant about brown algea?

Answer 20

• largest and most complex among protists
• generally found in marine habitat
• multicellular
• brown color comes from photosynthetic pigments in their chloroplast

Question 21

What are four unique characteristics about Diatoms?

Answer 21

• unicellular
• cell walls made of silica
• in fresh & marine waters
• generate lots of Oxygen in the atmosphere

Question 22

What are Protozoans?

Answer 22

heterotrophic protists that get nutrition by eating bacteria and smaller protists.

Question 23

What is an apical complex?

Answer 23

a complex of organelles at the apex of the infectious cell that specializes in penetrating host cells.

Question 24

Ciliates have:

Answer 24

Macro and Micro Nucleus

Question 25

What is an oral grove?

Answer 25

a ciliated indentation on the body that directs food toward the mouth

Question 26

What is a contracile Vacuole?

Answer 26

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.