Las algas

Algae are vital aquatic organisms similar to plants but without roots, stems, or leaves. They perform photosynthesis using chlorophyll and come in various shapes and sizes, from microscopic forms to large seaweeds like kelp. Kelp forests are crucial marine ecosystems. Algae also form symbiotic relationships, such as with coral, providing mutual benefits. They are sensitive indicators of climate change, highlighting their importance in global ecosystems.

What is a key difference between algae and plants?

• Algae lack real roots, stems, and leaves.

• Algae do not perform photosynthesis.

• Algae have a complex life cycle.

• Algae have real roots, stems, and leaves.

Which of the following is true about kelp?

• Kelp attaches to the seafloor and uses bladders to float.

• Kelp is a type of red algae.

• Kelp is a microscopic algae.

• Kelp grows in deep ocean waters only.

What is a kelp forest?

• A type of desert ecosystem.

• A forest found on land.

• A productive and dynamic marine ecosystem.

• A type of freshwater ecosystem.

How do algae benefit coral in their symbiotic relationship?

• By providing carbon dioxide.

• By cleaning the coral's surface.

• By providing shelter and protection.

• By supplying oxygen and nutrients through photosynthesis.

Why are algae considered important indicators of climate change?

• They show no signs of climate change.

• They are unaffected by environmental changes.

• They thrive in polluted waters.

• They are sensitive to changes in their habitats.