\nArchaebacteria differ from other bacteria in having a different cell wall structure and this feature is responsible for their survival in extreme conditions.
\n\n
Archaebacteria are divided into three groups - methanogens, halophiles, and thermoacidophiles.
\n\n
Methanogens: These bacteria are of marshy habitats. They are capable of converting CO2, methanol, and formic acid into methane so named methanogens. These methanogens are present in the guts of several ruminant animals such as cows and buffaloes, and they are responsible for the production of methane (biogas) from the dung of these animals. These are chemoautotrophs. \nExamples: Methanococcus, Methanobacterium, etc.
\n\n"},"encodingFormat":"text/html","position":1,"text":"Archaebacteria"},"comment":{"@type":"Comment","text":"Recall the type of bacteria adapted to live in extreme environments."},"eduQuestionType":"Multiple choice","encodingFormat":"text/markdown","learningResourceType":"Practice problem","suggestedAnswer":[{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":0,"text":"Eubacteria"},{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":2,"text":"Dinoflagellates"},{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":3,"text":"Slime moulds"}],"text":"Methanogens belong to:"},"name":"Quiz on Biological Classification","typicalAgeRange":"10-17","url":"https://www.embibe.com/questions/Methanogens-belong-to%3A/EM0149943"}
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
Identify combination of incorrect statements related to Cyanobacteria
I.Cyanobacteria are referred to as blue-green algae.
II. They perform oxygenic photosynthesis in chloroplasts.
II. The red-colour of red-sea is due to the presence of a cyanobacterial species Trichodesmium erythraeum.
IV. All the cyanobacterial species can fix atmospheric in specialised cells called heterocysts.