Question

1.The correct statement about cyanobacteria ( blue green algae)
a. Absence of motile organs
b. Cell wall is made up of cellulose
c. Absence of mucilage around the thallus
d. Presence of floridean starch

Answer 1

Answer:

A biological kingdom composed of prokaryotes (especially bacteria) is Monera. As such, it is made up of cells that are single-celled and without a true nucleus.

Now, let us find the solution from the options-

- Typically, Cyanobacteria receive their energy via oxygen photosynthesis, which creates oxygen gas in the Earth's atmosphere. Cyanobacteria are also named Blue-green algae. They are bacteria which are photosynthetic. Thus, option A is not the correct option.

- Single-celled biflagellates with two specialized flagella are golden algae. The pigment fucoxanthin and the use of oil droplets as a nutritional reserve define them. Desmids are sometimes referred to as golden algae. A single genus, Prymnesium parvum, is known. In fresh water, it is found. Thus, option B is not the correct option.

- Eubacteria is single-celled prokaryotic microorganisms which have a variety of features and are present in all regions of the world in diverse environments. Bacteria have two domains, namely archaea and Eubactaria. True bacteria, too, are named Eubactaria. They've got rigid walls of cells and flagella.

- Algal fungi are also named Phycomycetes. They have distinctive coenocytic aseptate hyphae. Thus, option D is not the correct option.

Thus, the correct answer is option (C) Eubactaria are also called false bacteria.

Note: Very high and low temperatures, basic and acidic conditions, and significant levels of radiation can be tolerated by Eubactaria. It's incredibly difficult to destroy endospores. Usually, for hours, they can be heated and still survive. Only Gram-positive bacteria can form endospores.

Answer 2

The correct statement about cyanobacteria ( blue-green algae) is the absence of motile organs.

Explanation:

• Blue green algae are normally found in freshwater.

• The cell wall is made up of mucopeptide or peptidoglycan.
• In blue-green algae, the reserved food material is cyanophycean starch.
• pyrenoids are absent.
• Photosynthesis takes place in photosynthetic lamellae.
• Asexual reproduction takes place by akinetes and hormogonium.