Podcast
Questions and Answers
What distinguishes the genus name from the species name in scientific naming?
What distinguishes the genus name from the species name in scientific naming?
- The genus name is capitalized and the species name is in lowercase (correct)
- Both are italicized
- The genus name is in bold and the species name is italicized
- The genus name is lowercase and the species name is capitalized
Which of the following shapes do bacilli prokaryotes take?
Which of the following shapes do bacilli prokaryotes take?
- Round cells
- Rod-shaped (correct)
- Spiral-shaped
- Irregular-shaped
What is the method by which phototrophs obtain energy?
What is the method by which phototrophs obtain energy?
- From sunlight (correct)
- From chemical reactions
- From consuming other organisms
- From decomposition of organic matter
Which of the following is a characteristic of Gram-positive bacteria?
Which of the following is a characteristic of Gram-positive bacteria?
What type of bacteria is responsible for converting the Earth's atmosphere from anaerobic to aerobic?
What type of bacteria is responsible for converting the Earth's atmosphere from anaerobic to aerobic?
What is a common characteristic of heterotrophs?
What is a common characteristic of heterotrophs?
Which organism is commonly known to aid in digestion in humans?
Which organism is commonly known to aid in digestion in humans?
Which of the following statements about spirochetes is true?
Which of the following statements about spirochetes is true?
What type of prokaryote is commonly described as being rod-shaped?
What type of prokaryote is commonly described as being rod-shaped?
Which prokaryote is known for fixing atmospheric nitrogen in plants?
Which prokaryote is known for fixing atmospheric nitrogen in plants?
Which characteristic is NOT associated with spirochetes?
Which characteristic is NOT associated with spirochetes?
Which of the following is an example of a chemotroph?
Which of the following is an example of a chemotroph?
What was the significant contribution of cyanobacteria to Earth’s atmosphere?
What was the significant contribution of cyanobacteria to Earth’s atmosphere?
Which of the following best describes phototrophs?
Which of the following best describes phototrophs?
What major role do Gram-positive bacteria such as Streptomyces play in medicine?
What major role do Gram-positive bacteria such as Streptomyces play in medicine?
Which of the following statements is true regarding the biomass of prokaryotes compared to eukaryotes?
Which of the following statements is true regarding the biomass of prokaryotes compared to eukaryotes?
Flashcards
Prokaryotes
Prokaryotes
Single-celled organisms without a nucleus, belonging to the domains Bacteria and Archaea. They were abundant 3.5 billion years ago and are found in various shapes like cocci, bacilli, and spirochetes.
Cocci
Cocci
Round-shaped prokaryotes, like the bacteria causing strep throat (streptococci).
Bacilli
Bacilli
Rod-shaped prokaryotes, like E. coli.
Spirochetes
Spirochetes
Signup and view all the flashcards
Phototrophs
Phototrophs
Signup and view all the flashcards
Chemotrophs
Chemotrophs
Signup and view all the flashcards
Autotrophs
Autotrophs
Signup and view all the flashcards
Heterotrophs
Heterotrophs
Signup and view all the flashcards
Prokaryote Biomass
Prokaryote Biomass
Signup and view all the flashcards
Prokaryotic Shapes
Prokaryotic Shapes
Signup and view all the flashcards
Rhizobium Symbiosis
Rhizobium Symbiosis
Signup and view all the flashcards
E. coli: Good and Bad
E. coli: Good and Bad
Signup and view all the flashcards
Spirochete Diseases
Spirochete Diseases
Signup and view all the flashcards
Streptomyces Importance
Streptomyces Importance
Signup and view all the flashcards
Cyanobacteria's Role
Cyanobacteria's Role
Signup and view all the flashcards
Prokaryotic Nutrition
Prokaryotic Nutrition
Signup and view all the flashcards
Study Notes
Prokaryotes and Protists
-
Prokaryotes are single-celled organisms.
-
The total biomass of prokaryotes is greater than the total biomass of eukaryotes.
-
Three shapes of prokaryotes: cocci (round), bacilli (rod-shaped), and spirochetes (spiral-shaped).
-
Examples of bacteria: streptococci (strep throat), E. coli, bacteria causing syphilis and Lyme disease.
-
Prokaryotes are diverse in how they obtain energy and carbon:
- Phototrophs: obtain energy from sunlight
- Chemotrophs: obtain energy from chemicals
- Autotrophs: obtain carbon from CO2
- Heterotrophs: obtain carbon from other organisms.
-
Bacteria can be symbiotic with plants (e.g., Rhizobium in plant nodules, fixing atmospheric nitrogen).
-
Bacteria can also be pathogens causing diseases in plants and humans (e.g., Salmonella, Vibrio cholerae, E. coli O157:H7). -Some bacteria can help humans (e.g., E. coli for digestion).
-
Spirochetes: helical bacteria causing diseases like syphilis and Lyme disease.
-
Gram-positive bacteria: e.g., Streptomyces, important for drug production, inhibiting growth of other bacteria (such as for tuberculosis control).
-
Cyanobacteria: generate oxygen. They were among the first organisms to change Earth's atmosphere from anaerobic to aerobic.
-
Archaea: found in many habitats, including extreme environments:
- Extreme halophiles: thrive in high-salt environments (e.g., Salt Lake in Utah, Dead Sea).
- Extreme thermophiles: thrive in high-temperature environments (e.g., hot springs, deep sea vents).
- Methanogens: produce methane in anaerobic environments (e.g., swamps).
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge on prokaryotes and protists with this quiz. Explore topics including the characteristics, shapes, and energy acquisition methods of prokaryotic organisms. Learn how certain bacteria can be beneficial while others may cause diseases in humans and plants.
