21. Blue-Green algae are __
[A] Symbiotic Nitrogen-Fixing Cyanobacteria
[B] Free-Living Nitrogen-Fixing Bacteria
[C] Loose Association of Nitrogen-Fixing Bacteria
[D] Symbiotic Nitrogen-Fixing Bacteria
Show Answer
Correct Answer: A [Symbiotic Nitrogen-Fixing Cyanobacteria]
Notes:
Blue-Green algae are Symbiotic Nitrogen-Fixing Cyanobacteria. Liverworts, cycad roots, fern, and lichens are also some of the Nitrogen-fixing cyanobacteria.
22. A bryophyte that has nitrogen-fixing blue-green algae in its thallus is__?
[A] Pogonatum
[B] Riccia
[C] Marchantia
[D] Anthoceros
Show Answer
Correct Answer: D [Anthoceros]
Notes:
A bryophyte that has nitrogen-fixing blue-green algae in its thallus is Anthoceros. Species of Anthoceros have a small to medium-sized green thallus.
23. Which of the following statements regarding algae is incorrect.
[A] Most algae are photosynthetic
[B] Algae can be classified according to their pigments
[C] All algae are filamentous
[D] Spirogyra does not produce zoospores
Show Answer
Correct Answer: C [All algae are filamentous]
Notes:
Most algae are photosynthetic, Algae can be classified according to their pigments and Spirogyra does not produce zoospores.
24. Which of the following do you consider the best evidence to show that the two species of algae are closely related.
[A] They both respire and release CO2
[B] They both are found in the same habitat
[C] They both reproduce asexually
[D] They both have same type of pigments
Show Answer
Correct Answer: D [They both have same type of pigments]
Notes:
The best evidence to show that the two species of algae are closely related is – They both have same type of pigments.
25. Algae cell wall is made up of which of the following?
[A] Chitin
[B] Cutin
[C] Cellulose
[D] Suberin
Show Answer
Correct Answer: C [Cellulose]
Notes:
The Algae cell wall is made up of Cellulose.
26. Which of the following is a common feature of protonema of multicellular fungi, filamentous algae, and mosses?
[A] way of nutrition
[B] diplomatic life cycle
[C] multiply by fragmentation
[D] members of the plant kingdom
Show Answer
Correct Answer: C [multiply by fragmentation]
Notes:
The protonema of multicellular fungi, filamentous algae and mosses all show multiplication by fragmentation.
27. Green algae, red algae and brown algae are common examples of__?
[A] Thallophyta
[B] Bryophyta
[C] Pteridophyta
[D] Gymnosperms
Show Answer
Correct Answer: A [Thallophyta]
Notes:
Green algae, red algae and brown algae are common examples of Thallophyta.
28. Which of the following are blue-green algae?
[A] Prokaryotes
[B] Eukaryotes
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: A [Prokaryotes]
Notes:
Blue-green algae or cyanobacteria are prokaryotes. They lack membrane bound organelles and a nucleus.
29. Phaeophyceae is commonly known as which of the following algae?
[A] Green Algae
[B] Brown Algae
[C] Red Algae
[D] Blue Algae
Show Answer
Correct Answer: B [Brown Algae]
Notes:
Brown algae, which include the class Phaeophyceae, are a large group of multicellular algae, which includes many seaweeds located in cold waters within the Northern Hemisphere. Brown algae are the major seaweeds of temperate and polar regions.
30. Green Algae are known as__?
[A] Rhodophyceae
[B] Chlorophyceae
[C] Phaeophyceae
[D] Green tide
Show Answer
Correct Answer: B [Chlorophyceae]
Notes:
Algae is a Thalloid plant and autotrophic in nature. Mostly algae is aquatic and contains chlorophyll. Green algae is also known as Chlorophyceae.
