Algae Classification

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Questions and Answers

What is unique about cyanobacteria?

They are eukaryotes

They are found only in freshwater

They are classified as algae

They are prokaryotes (correct)

What is true about all types of algae?

They are all prokaryotes

They are all classified as plants

They are all eukaryotes, except cyanobacteria (correct)

They are all found in saltwater

Why are cyanobacteria classified as algae?

Because they are photosynthetic

Because they are prokaryotes

Because they are similar in structure to algae (correct)

Because they are eukaryotes

What is the main difference between cyanobacteria and other algae?

Their cell structure Signup and view all the answers

Which of the following is NOT true about cyanobacteria?

They are eukaryotes Signup and view all the answers

Where can algae grow unexpectedly?

Tree trunks Signup and view all the answers

What type of organisms can algae form symbiotic relationships with?

Only non-photosynthetic organisms Signup and view all the answers

What is an example of a symbiotic relationship formed by algae?

Lichens Signup and view all the answers

Which of the following is NOT a place where algae can grow?

Ocean sediments Signup and view all the answers

What type of relationship can algae form with mollusks?

Symbiotic relationship Signup and view all the answers

What is the primary result of algal blooms?

Production of toxins Signup and view all the answers

What is a consequence of the disruption of natural aquatic ecosystems by algal blooms?

Changes to the food chain Signup and view all the answers

What type of organisms are responsible for algal blooms?

Microalgae Signup and view all the answers

What is an economic consequence of algal blooms?

Increased costs of water treatment Signup and view all the answers

What is the overall effect of algal blooms on aquatic ecosystems?

Disruption of the ecosystem Signup and view all the answers

What is one of the conditions that they can endure?

Range of temperatures Signup and view all the answers

Which of the following is NOT a condition that they can endure?

High pressure Signup and view all the answers

What is another condition that they can endure?

Turbidity Signup and view all the answers

Which of the following is a condition that they can endure?

Oxygen or carbon dioxide concentrations Signup and view all the answers

What is one of the conditions that they can endure?

Acidity Signup and view all the answers

What are the main sources of nitrogen that contribute to environmental issues?

Fertilizers used in agriculture and animal manures Signup and view all the answers

What is the primary component of fertilizers and animal manures that affects the environment?

Nitrogen Signup and view all the answers

What is the main human activity responsible for the increase in nitrogen levels in the environment?

Agriculture Signup and view all the answers

What is the result of excessive nitrogen in the environment?

Environmental pollution Signup and view all the answers

What is the primary source of nitrogen in animal manures?

Animal feed Signup and view all the answers

Study Notes

Characteristics of Algae

Algae are eukaryotes, except for cyanobacteria, which are prokaryotes
Can endure a range of temperatures, oxygen or carbon dioxide concentrations, acidity, and turbidity

Unusual Growth Locations

Found growing on tree trunks, animal fur, snow banks, and hot springs

Symbiotic Relationships

Can form symbiotic relationships with non-photosynthetic organisms, including:
- Ciliates
- Sponges
- Mollusks
- Fungi (as lichens)

Algal Blooms

Result from the rapid growth of certain microalgae
Lead to the production of toxins and disruption of natural aquatic ecosystems
Increase the costs of water treatments
Caused by human activities, including:
- Use of fertilizers in agriculture
- Animal manures rich in nitrogen