Podcast
Questions and Answers
What is the primary characteristic that distinguishes Euglenozoa as a clade?
What is the primary characteristic that distinguishes Euglenozoa as a clade?
What is the function of the alveoli in Alveolata?
What is the function of the alveoli in Alveolata?
Which of the following is NOT a characteristic of Dinoflagellates?
Which of the following is NOT a characteristic of Dinoflagellates?
What is the name of the disease caused by Trypanosoma gambiense?
What is the name of the disease caused by Trypanosoma gambiense?
Signup and view all the answers
Which supergroup is thought to have originated by a secondary endosymbiosis event with a red alga?
Which supergroup is thought to have originated by a secondary endosymbiosis event with a red alga?
Signup and view all the answers
What is the name of the toxic bloom caused by Dinoflagellates?
What is the name of the toxic bloom caused by Dinoflagellates?
Signup and view all the answers
Which group of organisms includes both free-living consumers of prokaryotes and parasites?
Which group of organisms includes both free-living consumers of prokaryotes and parasites?
Signup and view all the answers
What is the name of the single mitochondrion with an organized mass of DNA found in Kinetoplastids?
What is the name of the single mitochondrion with an organized mass of DNA found in Kinetoplastids?
Signup and view all the answers
What is a characteristic of protists that distinguishes them from other eukaryotes?
What is a characteristic of protists that distinguishes them from other eukaryotes?
Signup and view all the answers
Which of the following is NOT a nutritional strategy used by protists?
Which of the following is NOT a nutritional strategy used by protists?
Signup and view all the answers
What is a characteristic of single-celled protists?
What is a characteristic of single-celled protists?
Signup and view all the answers
Which group of protists includes Euglenozoa and Diplomonads?
Which group of protists includes Euglenozoa and Diplomonads?
Signup and view all the answers
What is a characteristic of the life cycle of some protists?
What is a characteristic of the life cycle of some protists?
Signup and view all the answers
Which group of protists includes Dinoflagellates and Apicomplexans?
Which group of protists includes Dinoflagellates and Apicomplexans?
Signup and view all the answers
What is a characteristic of the supergroup SAR?
What is a characteristic of the supergroup SAR?
Signup and view all the answers
What is a characteristic of the supergroup Excavates?
What is a characteristic of the supergroup Excavates?
Signup and view all the answers
What is the primary function of pseudopodia in radiolarians?
What is the primary function of pseudopodia in radiolarians?
Signup and view all the answers
What is the characteristic feature of foraminiferan tests?
What is the characteristic feature of foraminiferan tests?
Signup and view all the answers
What is the supergroup that includes red algae, green algae, and land plants?
What is the supergroup that includes red algae, green algae, and land plants?
Signup and view all the answers
What is the primary pigment responsible for the reddish color of red algae?
What is the primary pigment responsible for the reddish color of red algae?
Signup and view all the answers
What is the term for the process by which radiolarians capture food using their pseudopodia?
What is the term for the process by which radiolarians capture food using their pseudopodia?
Signup and view all the answers
What is the term for the group of organisms that includes animals, fungi, and some protists?
What is the term for the group of organisms that includes animals, fungi, and some protists?
Signup and view all the answers
What is the term for the algae that are most closely related to land plants?
What is the term for the algae that are most closely related to land plants?
Signup and view all the answers
What is the term for the process by which foraminiferan tests are preserved in marine sediments?
What is the term for the process by which foraminiferan tests are preserved in marine sediments?
Signup and view all the answers
Study Notes
Euglenozoa
- A diverse clade that includes euglenids and kinetoplastids
- Members can be predatory heterotrophs, photosynthetic autotrophs, or parasites
- Characterized by a spiral or crystalline rod of unknown function inside their flagella
- Euglenids have one or two flagella that emerge from a pocket at one end of the cell
- Kinetoplastids have a single mitochondrion with an organized mass of DNA called a kinetoplast
Kinetoplastids
- Include free-living consumers of prokaryotes in freshwater, marine, and moist terrestrial ecosystems
- Examples: Trypanosoma gambiense (causes sleeping sickness in humans) and another pathogenic trypanosome that causes Chagas’ disease leading to congestive heart failure
SAR (Supergroup)
- Proposed to have originated by a secondary endosymbiosis event involving a red alga
- A controversial clade that includes alveolates and stramenopiles
Alveolata (Sub-group)
- Characterized by membrane-bounded sacs (alveoli) just under the plasma membrane
- Function of alveoli is unknown
- Includes dinoflagellates, apicomplexans, and ciliates
Dinoflagellates
- Have two flagella and each cell is reinforced by cellulose plates
- Abundant components of both marine and freshwater phytoplankton
- A diverse group of aquatic phototrophs, mixotrophs, and heterotrophs
- Can cause toxic "red tides" through blooms
Protists
- The informal name for a group of mostly unicellular eukaryotes that are not fungi, plants, or animals
- A polyphyletic group, with Protista no longer valid as a kingdom
- Can be unicellular, colonial, or multicellular
- Nutritionally diverse, including photoautotrophs, heterotrophs, and mixotrophs
- Can reproduce asexually, sexually, or by alternation of generations
Archaeplastida (Supergroup)
- Includes red algae, green algae, and land plants
- Characterized by the presence of chloroplasts
Rhodophyta (Red Algae)
- Reddish in color due to the accessory pigment phycoerythrin
- Multicellular; the largest are seaweeds
- Most abundant large algae in coastal waters of the tropics
Green Algae
- Named for their grass-green chloroplasts
- Plants are descended from green algae
- A paraphyletic group, with two main groups: chlorophytes and charophytes
- Chlorophytes live in freshwater, although many are marine
- Charophytes are the most closely related to land plants
Unikonta (Supergroup)
- Includes animals, fungi, and some protists
- Characterized by the presence of amoebozoans and opisthokonts (animals, fungi, and related protists)
- The root of the eukaryotic tree remains controversial
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Learn about the features and types of Euglenozoa, including euglenids and kinetoplastids, and their distinct characteristics such as flagella and kinetoplast.
