Tag: the living world

Questions Related to the living world

Archaebacteria common in marshes and rice fields are

botany the living world archaebacteria the three domains of life classification of microbes

  1. Methanogens

  2. Halophiles

  3. Thermoacidophiles

  4. All of the above

Show answer
Correct Option: A
Explanation:

Methanogens belongs to Archaebacteria. The other members of Archaebacteria includes halophiles and thermophiles. These are primitive prokaryotes. Methanogens produce methane gas or biogas. They produce biogas or marshy gas in marshy areas, rice fields and digestive tract of ruminants.

Thus, the correct answer is 'Methanogens.'

Which one among the following is likely to be present in the harsh conditions of the deep sea water?

botany the living world archaebacteria the three domains of life classification of microbes

  1. Saprophytic fungi

  2. Archaebacteria

  3. Eubacteria

  4. Blue-green algae

Show answer
Correct Option: B
Explanation:
Archeabacteria are also known as extremophiles because of the ability to survive in extreme environmental conditions. The deep sea environment is characterized by increased pressure, low visibility, low in nutrition etc. 
So, the correct answer is Archaebacteria.

A few organisms are known to grow and at temperatures of $ 100-105^o C. $ They before ________________.

botany the living world archaebacteria the three domains of life classification of microbes

  1. Thermophilic sulphur bacteria

  2. Hot spring blue-green algae

  3. Thermophilic subaerial fungi

  4. Marine archaebacteria

Show answer
Correct Option: A

Barophilic prokaryotes -

botany the living world archaebacteria the three domains of life classification of microbes

  1. Grow slowly in highly alkaline frozen lakes

    at high altitudes

  2. Grow and multiply in very deep marine

    sediments

  3. Readily grow and divide in sea water

    enriched in any soluble salt of barium

  4. Occur in water containing high

    concentrations of barium hydroxide

Show answer
Correct Option: B
Explanation:
Barophilic prokaryotes grow and multiply in very deep marine sediments. A barophilic prokaryote, also generally defined as a barophile, is a type of organism which occurs and exists at high-pressure zones, like a deep-sea bacteria and archaebacteria.
So, the correct answer is 'Grow and multiply in very deep marine sediments'. 

Dermatomes are _________________.

botany the living world archaebacteria the three domains of life classification of microbes

  1. Formed during bacterial conjugation

  2. Small vesicles found in pancreatic cells

  3. Synthesized during cell wall formation in plant

  4. Specialized regions of cell membrane for adhesion to other cells in animal tissues

Show answer
Correct Option: A

Methanogens are best described as ____________.

botany the living world archaebacteria the three domains of life classification of microbes

  1. Archaebacteria

  2. Prokaryotes

  3. Slime moulds

  4. Protozoa

Show answer
Correct Option: A

Which of the following are likely to be present in deep sea water ?

botany the living world archaebacteria the three domains of life classification of microbes

  1. Archaebacteria

  2. Eubacteria

  3. Blue-green algae

  4. Saprophytic fungi

Show answer
Correct Option: A,B
Explanation:

Archeabacteria are also known as extremophiles because of the ability to survive in extreme environmental conditions. The deep sea environment is characterized by increased pressure, low visibility, low in nutrition etc. Benthic zone also harbors bacteria

So, the correct answer is 'Archaebacteria and Eubacteria'

Which of the following are true of archaeobacteria?
a. Presence of peptiloglycan cell wall.
b. Extreme halophytes
c. Extreme themophyles
d. Methadone's
Select the correct answer using the codes given.

botany the living world archaebacteria the three domains of life classification of microbes

  1. $1, 2$ and $3$

  2. $2, 3$ and $4$

  3. $1, 3$ and $4$

  4. $1, 2$ and $4$

Show answer
Correct Option: A

Obligate anaerobic archaebacreria with chemoautotrophic mode of nutrition are ____________.

botany the living world archaebacteria the three domains of life classification of microbes

  1. Mathanocens

  2. Halphiles

  3. Thermoacidophiles

  4. More than one option is correct

Show answer
Correct Option: A

Which of the following options is correct?

botany the living world archaebacteria the three domains of life classification of microbes

  1. Heterocyst are thin-walled and help in nitrogen fixation

  2. Archaebacteria are oldest living

  3. Fossil cell wall of archaebacteria and eubacteria are different but cell membrane are similar

  4. Penicilllin is an effective against mycoplasma

Show answer
Correct Option: B
Explanation:

Archaebacteria are the oldest living organism. They can be found in some of the harshest environments. Traces of Archaebacteria have been seen in 3.8 billion-year-old fossil. Thus, are claimed as the oldest living organism. Heterocysts are nitrogen-fixing cells found in Nitrogen deprived cells of bacteria like cyanobacteria, Anabaena, Nostoc etc. Heterocyst synthesizes additional 3 layers of the cell wall, in turn, producing a THICK cell wall.The cell wall and cell membrane of archaebacteria both differ from that of eubacteria.The antibiotic, penicillin is ineffective against mycoplasma. So, the correct answer is option B.