Question

1. Simplest organism would be: A. Nostoc C. Bacillus B. Escherichia D. Thermus​

Answer 1

Explanation:

Nostoc is not an alien lifeform, nor is it a plant, algae, or bacterium. Instead, Nostoc is a cyanobacterium. Cyanobacteria are like bacteria in that they are microscopic, single-celled organisms that contain no cell nucleus. Nostoc cyanobacteria form single-celled threadlike structures called filaments.

Answer 2

Option A would be the simplest organism. Nostoc

Explanation:

Nostoc

• Inanimate Life presents Nostoc, the world's tiniest multicellular organism.
• Nostoc is neither an alien nor a plant, algae, or bacterium. Nostoc is a kind of cyanobacterium.
• Cyanobacteria are small, single-celled creatures that lack a cell nucleus, similar to bacteria.
• Filaments are single-celled thread-like structures formed by Nostoc cyanobacteria.
• The organism Nostoc is a single-celled organism.
• It's a type of microbe that aids in nitrogen fixation.
• It is a member of the monera family.
• Nostoc filaments are unbranched and spherical, barrel-shaped, or oval.
• Both heterocysts (thick-walled, specialized N-fixing cells) and akinetes can be found in the filaments (trichomes) (the thick-walled cell which functions as a resting cell).

Escherichia

• Another rod-shaped facultatively anaerobic genus featuring members that live in the human intestine is Escherichia.
• The majority of Escherichia coli species are nonpathogenic commensals.
• Other species can cause enteritis or infections of the urinary tract.

Bacillus

• Bacillus species are utilized in a variety of medical, pharmaceutical, agricultural, and industrial operations due to their diverse physiologic features and capacity to produce a wide range of enzymes, antibiotics, and other metabolites.

Thermus​

• Thermus is a thermophilic bacteria genus.
• The Deinococcus–Thermus bacterium is one of numerous in the Deinococcus–Thermus genus.