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Questions and Answers
Which characteristic is NOT typical of protozoans?
Which characteristic is NOT typical of protozoans?
- Presence of a rigid cell wall (correct)
- Unicellular structure
- Eukaryotic cellular organization
- Motility in at least one stage of their life cycle
A period of unfavorable environmental conditions triggers a protozoan to enter a dormant phase. What is the name of this structure?
A period of unfavorable environmental conditions triggers a protozoan to enter a dormant phase. What is the name of this structure?
- Sporozoite
- Cyst (correct)
- Trophozoite
- Schizont
Which algal group is characterized by having silica in their cell walls and being a major contributor to global oxygen production?
Which algal group is characterized by having silica in their cell walls and being a major contributor to global oxygen production?
- Phaeophyta
- Chlorophyta
- Rhodophyta
- Chrysophyta (correct)
Agar, a substance commonly used in microbiological media, is extracted from which group of algae?
Agar, a substance commonly used in microbiological media, is extracted from which group of algae?
Which reproductive strategy involves multiple nuclear divisions before the cell itself divides?
Which reproductive strategy involves multiple nuclear divisions before the cell itself divides?
A scientist is studying a new species of algae. Upon microscopic examination, they observe that it has a green pigment. To which group does it likely belong?
A scientist is studying a new species of algae. Upon microscopic examination, they observe that it has a green pigment. To which group does it likely belong?
During an investigation, a microbiologist observes a motile, feeding stage of a protozoan. What is the name of this active form?
During an investigation, a microbiologist observes a motile, feeding stage of a protozoan. What is the name of this active form?
Which habitat is LEAST likely to support protozoan growth and survival?
Which habitat is LEAST likely to support protozoan growth and survival?
If a sample of algae is found to have a cell wall containing a high concentration of silica, it would MOST likely be classified as:
If a sample of algae is found to have a cell wall containing a high concentration of silica, it would MOST likely be classified as:
Algae exhibit both asexual and sexual reproduction. Under what conditions might sexual reproduction be favored over asexual reproduction in algae?
Algae exhibit both asexual and sexual reproduction. Under what conditions might sexual reproduction be favored over asexual reproduction in algae?
Flashcards
Algae
Algae
Photosynthetic, aquatic organisms.
Life Cycle of Algae
Life Cycle of Algae
Asexual and sexual reproduction.
Chlorophyta
Chlorophyta
Green algae.
Rhodophyta
Rhodophyta
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Phaeophyta
Phaeophyta
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Chrysophyta
Chrysophyta
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Protozoans
Protozoans
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Trophozoite
Trophozoite
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Cyst
Cyst
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Schizogony
Schizogony
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Study Notes
- Algae are photosynthetic, aquatic organisms.
- Algae reproduce both asexually and sexually.
Classification of Algae:
- Chlorophyta: green algae
- Rhodophyta: red algae, cell wall contains agar
- Phaeophyta: brown algae
- Chrysophyta: golden and yellow-green algae & diatoms, cell wall contains silica
- Diatoms are a major source of the world's oxygen.
- Protozoans are eukaryotes, unicellular, and lack a cell wall.
- Protozoans are mostly motile.
- Protozoans require a moist environment to survive.
- Trophozoite: motile, active, feeding form of protozoans
- Cyst: dormant form of protozoans, survives through unfavorable conditions
- Protozoans reproduce asexually through schizogony: the nucleus undergoes multiple divisions before the cell divides.
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