BIO 1020 Quiz 2: Protists, Algae, and Marine Biology Concepts – Guided Study

Q1. Are “protists” monophyletic eukaryotes?

Background

Topic: Evolutionary Relationships and Classification

This question tests your understanding of the evolutionary grouping of protists and whether they form a single clade (monophyletic group) within the eukaryotes.

Key Terms:

• Monophyletic: A group consisting of an ancestor and all its descendants.

• Protists: Diverse group of mostly unicellular eukaryotic organisms.

• Eukaryotes: Organisms with cells that contain a nucleus and other organelles.

Step-by-Step Guidance

1. Recall the definition of a monophyletic group and how it applies to evolutionary trees.

2. Think about the diversity of organisms classified as protists (e.g., algae, amoebas, slime molds).

3. Consider whether all protists share a single common ancestor exclusive to them, or if they are spread across different branches of the eukaryotic tree.

4. Review your textbook or lecture notes on the classification of protists and how modern systematics views this group.

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Q2. Do giant kelp and Sargassum provide food and shelter to many marine organisms?

Background

Topic: Marine Ecology and Algae

This question is about the ecological roles of large brown algae (giant kelp and Sargassum) in marine environments.

Key Terms:

• Giant kelp: Large brown algae that form underwater forests.

• Sargassum: A genus of brown algae, often found floating in large mats.

• Marine organisms: Animals and plants living in the ocean.

• Food and shelter: Ecological functions that support marine biodiversity.

Step-by-Step Guidance

1. Recall the structure and habitat of giant kelp and Sargassum in marine ecosystems.

2. Think about the types of organisms that might live among or feed on these algae.

3. Consider the ecological importance of habitat-forming species in supporting marine life.

4. Review examples from your course materials or textbook about kelp forests and Sargassum mats.

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Q3. Is the red alga photosynthetic?

Background

Topic: Algal Biology and Photosynthesis

This question tests your knowledge of the metabolic processes of red algae and their role in aquatic ecosystems.

Key Terms:

• Red alga (Rhodophyta): A group of mostly multicellular, marine algae.

• Photosynthetic: Capable of converting light energy into chemical energy (sugars).

Step-by-Step Guidance

1. Recall the main groups of algae and their metabolic strategies.

2. Think about the pigments present in red algae and how they capture light energy.

3. Consider the environments where red algae are found and how photosynthesis benefits them.

4. Review your notes on the ecological roles of red algae in marine systems.

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Q4. Tell us about your most favorite “Protista.”

Background

Topic: Protist Diversity and Personal Reflection

This is an open-ended question asking you to reflect on a protist you find interesting and to share some facts or reasons for your choice.

Key Points to Consider:

• Choose a specific protist (e.g., Paramecium, Euglena, Plasmodium, etc.).

• Describe its main features (shape, movement, habitat, etc.).

• Mention any unique adaptations or ecological roles.

• Explain why you find it interesting or important.

Step-by-Step Guidance

1. Pick a protist you remember from class or find fascinating.

2. List 2–3 facts about its biology, ecology, or significance.

3. Write 1–2 sentences explaining why you chose this protist.

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