AP BIOLOGY

EVOLUTION

THE ORIGIN OF LIFE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What similarities are there between the ways Archaea and Bacteria react to difficult environmental conditions?
A
They both create a capsule around the cell or add cellulose to their cell walls for protection.
B
They both develop flagella to swim away or change their cell membranes for protection.
C
They both form endospores for protection or develop cilia or flagella to swim away.
D
They both make their own toxins or switch to photosynthesis as alternate sources of food.
Explanation: 

Detailed explanation-1: -Both Bacteria and Archaea are prokaryotes, single-celled microorganisms with no nuclei, and Eukarya includes us and all other animals, plants, fungi, and single-celled protists – all organisms whose cells have nuclei to enclose their DNA apart from the rest of the cell.

Detailed explanation-2: -Similar to bacteria, archaea do not have interior membranes but both have a cell wall and use flagella to swim. Archaea differ in the fact that their cell wall does not contain peptidoglycan and cell membrane uses ether linked lipids as opposed to ester linked lipids in bacteria.

Detailed explanation-3: -How are they different from bacteria? Archea is a domain of living organisms containing unicellular prokaryotic organisms. Cell wall in arechea is made up of Pseudopeptidoglycan, whereas in bacteria, it is made up of either Lipopolysaccharide or Peptidoglycan.

Detailed explanation-4: -A possible answer is: Bacteria contain peptidoglycan in the cell wall; archaea do not. The cell membrane in bacteria is a lipid bilayer; in archaea, it can be a lipid bilayer or a monolayer. Bacteria contain fatty acids on the cell membrane, whereas archaea contain phytanyl.

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