Exploring the World of Algae

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Which of the following is a characteristic of algae?

They occur only in marine habitats

They are autotrophic (correct)

They are heterotrophic

They reproduce only through sexual methods

Which of the following is an example of a filamentous algae?

Volvox

Ulothrix

Spirogyra (correct)

Kelp

How do algae reproduce vegetatively?

By asexual methods

By fusion of gametes

By producing spores

By fragmentation (correct)

What is the most common type of spore produced by algae?

Zoospores Signup and view all the answers

What is the term for sexual reproduction in algae where the gametes are similar in size?

Isogamous Signup and view all the answers

Which of the following is an example of anisogamous reproduction in algae?

Eudorina Signup and view all the answers

How is oogamous reproduction in algae characterized?

Fusion of two different-sized gametes Signup and view all the answers

What is the primary role of algae in the ecosystem?

To increase the level of dissolved oxygen Signup and view all the answers

Which class do algae belong to?

All of the above Signup and view all the answers

Which algae are used commercially to produce hydrocolloids?

Phaeophyceae Signup and view all the answers

Which algae are used to grow microbes and in preparations of ice-creams and jellies?

Rhodophyceae Signup and view all the answers

Which algae is rich in proteins and used as a food supplement even by space travellers?

Chlorophyceae Signup and view all the answers

Which algae are among the species used as food?

All of the above Signup and view all the answers

Which algae produce algin, a water holding substance used commercially?

Laminaria Signup and view all the answers

Which algae produce carrageen, a water holding substance used commercially?

Sargassum Signup and view all the answers

Which commercial product is obtained from Gelidium and Gracilaria algae?

Agar Signup and view all the answers

Which commercial product is used in the preparation of ice-creams and jellies?

Carrageen Signup and view all the answers

Exploring the World of Algae

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