The Vital Role of Algae in Ecosystems and Oxygen Production

The video explains algae, plant-like organisms without roots, stems, or leaves, and their classification as protists. It covers various types of algae, including green, red, and brown algae, and their roles in photosynthesis and oxygen production. The video also discusses single-celled algae like euglenoids, diatoms, and dinoflagellates, highlighting their unique features. Finally, it addresses algal blooms, their causes, and their impact on aquatic ecosystems.

What distinguishes algae from plants?

• Algae have roots, stems, and leaves.

• Algae are plant-like but lack roots, stems, and leaves.

• Algae are classified as fungi.

• Algae are a type of animal.

Which process allows algae to produce oxygen?

• Photosynthesis

• Respiration

• Fermentation

• Digestion

What is the most common type of algae?

• Blue algae

• Brown algae

• Red algae

• Green algae

Which substance found in red algae is used in food products?

• Silica

• Carrageenan

• Flagellum

• Chlorophyll

What unique feature do euglenoids possess?

• They have eye spots sensitive to light.

• They have a silica-rich cell wall.

• They are multicellular.

• They spin in circles using flagella.

What causes diatoms to sparkle under a microscope?

• Their chlorophyll content

• Their red pigment

• Their silica-rich cell walls

• Their flagella

What is a major consequence of algal blooms?

• Increased oxygen levels in water

• Enhanced photosynthesis in underwater plants

• Blocked sunlight and reduced oxygen levels

• Decreased water temperature

What is a common cause of algal blooms?

• Nutrient pollution from farms and factories

• Lack of sunlight

• Absence of chlorophyll

• Cold water temperatures

How does temperature affect algal blooms?

• Temperature has no effect on algae.

• Algae thrive in cold temperatures.

• Algae prefer moderate temperatures.

• Algae grow more in warm temperatures.

What is thermal pollution's role in algal blooms?

• It reduces algal growth.

• It extends algal blooms into colder months.

• It cools down the water, preventing blooms.

• It has no impact on algal blooms.