Algae.2

Question 1

What are the three main classes of algae?

Answer 1

Chlorophyceae, Phaeophyceae, Rhodophyceae

These classes represent the major divisions of algae based on their characteristics.

Question 2

What is Chlorella and its significance?

Answer 2

A unicellular alga rich in proteins used as a food supplement

Chlorella is utilized by travelers and has applications in various food products.

Question 3

Which algae are used to produce carrageen?

Answer 3

Gelidium and Gracilaria

Carrageen is derived from red algae and is commonly used in food products.

Question 4

What is agar and from which type of algae is it obtained?

Answer 4

Agar is obtained from red algae

It is a hydrocolloid used in various food applications.

Question 5

Name two species of marine algae.

Answer 5

Laminaria and Sargassum

These are among the 70 species of marine algae that have ecological significance.

Question 6

What role do algae play in aquatic ecosystems?

Answer 6

They are primary producers of energy-rich compounds

Algae form the basis of the food cycles for aquatic animals.

Question 7

What is the importance of algae in terms of oxygen production?

Answer 7

They increase the level of dissolved oxygen through photosynthesis

This process is crucial for aquatic life.

Question 8

Fill in the blank: The fixation of _____ on earth is carried out by algae.

Answer 8

carbon dioxide

Algae play a significant role in the global carbon cycle.

Question 9

True or False: Algae are only useful for their nutritional value.

Answer 9

False

Algae have a variety of uses beyond nutrition, including industrial applications.