Tag: biology

Eubacteria, or "genuine" microbes, are single-celled prokaryotic microorganisms that have a scope of qualities and are found in different conditions all through all parts of the world. A wide range of microscopic organisms falls under this title, with the exception of archaebacteria. Since eubacteria are so normal, it contains one of the three areas of life; the three spaces are Archaea, Bacteria, and Eukarya.

The eight kingdom system of classification was given by Tom cavalier smith. His classification completely reversed the Whittaker's five kingdom classification. The eight kingdoms in Cavalier Smith’s classification are Eubacteria, Archaebacteria, Archezoa, Protozoa, Chromista, Plantae, Fungi, and Animalia

The correct answer is A.

Among the given options, Animalia, Fungi and Plantae clearly fall under the eukaryotic domain. Protista can be considered as a heterogeneous group of eukaryotes as they consist of a nucleus enveloped in a nuclear membrane. Eubacteria basically refers to the entire bacterial population which will consist of unicellular prokaryotes. 

Choanocytes or collar cells are the main cell types of kingdom Porifera. Coelenterata (Cnidaria) have nematocysts to catch the prey. Phylum Annelida contains ringworms or segmented worms. Monerans are unicellular prokaryotic organisms.

The correct answer is D. 

Bacteria having rod shaped structure are called as Bacilli. Examples include Clostridium tetani, Corynebacterium. Bacteria that are round in shape are called as cocci. Examples include Streptococcus pneumoniae, Staphylococcus aureus. Bacteria having comma-like single curve in their body are Vibrio. Examples include Vibrio cholerae, Vibrio vulnificus. Bacteria having spiral shape are called as Spirilla. Examples include Spirillum, Campylobacter.

Bacillus subtilis are also called as hay bacillus. They are gram-positive bacteria. They are commonly found in hay or upper layer of soil. Hence, they are called as hay bacteria. They are also found in the GI tract of ruminants and humans. They are obligate aerobes. 

Treponema pallidum is a motile spirochaete bacterium that causes sexually transmitted disease syphilis.  It is a helically coiled microorganism. It belongs to the group Spirillum. It is a gram-negative bacteria. 

Myxophyceae is the other name for blue green algae or Cyanobacteria. It is a prokaryotic unicellular organism. It lacks membrane bound organelles like mitochondria, golgi complex. It also lacks true nucleus. Incipient nucleus or nucleoid is present in it. Incipient nucleus is a genetic material without nuclear envelope.

Monera kingdom includes prokaryotic unicellular organisms. They lack membrane-bound organelles like mitochondria, Golgi complex. They also lack a true nucleus. Instead, they have nucleoid, genetic material without a nuclear envelope. Examples include bacteria, Cyanophyceae (Blue-Green algae).