Question

How are archaea and bacteria alike?

Answer 1

Archaea and bacteria are similar in that their cells are small and lack a nucleus.

Further Explanation

• Living organisms can either be classified as prokaryotes or eukaryotes.

Eukaryotes  

• These are organisms that contain membrane bound nucleus and membrane bound organelles such as endoplasmic reticulum, Golgi apparatus, mitochondria, etc.

Prokaryotes  

• These are organisms that lack nucleus membrane and a nucleus together with membrane bound organelles. They include lower organisms such as bacteria and Archaea.

• Archaea and bacteria are examples of prokaryotes since they lack nucleus and other membrane bound organelles such as mitochondrion, endoplasmic reticulum, etc.

Similarities between Archaea and Bacteria

• Both are prokaryotic organisms  
• They have ribosomes which is the site for protein synthesis  
• Both lack membrane-bound cellular organelles such as mitochondrion.
• Both archaea and bacteria have flagella

Differences between Archaea and Bacteria

• Archaea cell wall contains  while the cell wall of bacteria contains peptidoglycan
• Bacteria can form spores which remain dormant for years until they get a suitable habitat for them to grow, while Archaea do not.
• Archaea live in extreme and harsh environments such as salt lakes, oceans,etc. while bacteria are in areas such as in the soil, organic matter, etc.

Keywords: Prokaryotes, Archaea, Bacteria

Learn more about  

• Archaea: brainly.com/question/1067634
• Bacteria: brainly.com/question/2901356
• Prokaryotes: brainly.com/question/3949239
• Eukaryotes: brainly.com/question/3949239

Level: High school

Subject: Biology  

Topic: Classification  

Subtopic: Bacteria and Archaea  

Answer 2

Answer:

The correct answer would be b. Their cells are small and lack a nucleus.

Both archaea and bacteria are prokaryotic organisms that is, they both are devoid of a nucleus and other membrane-bound organelles such as mitochondria, chloroplast et cetera.

They also share a similarity in terms of shape and size of the cells. Both of them are unicellular in nature and can not be seen by naked eyes.

They show variations in their genetic and biochemical ways. For example, archae contains three RNA polymerases whereas bacteria contain a single RNA polymerase.

Their cell wall also show variation in composition. For example, a bacterial cell wall contains peptidoglycans, whereas archae cell wall does not.

Thus, we can say that archae and bacteria are similar in a manner that their cells are small and lack a nucleus.