Which of the following statements is not true?
a. archaea and bacteria have different membrane lipids.
b. the cell walls of archaea lack peptidoglycan.
c. only bacteria have histones associated with dna.
d. only some archaea use co2 to oxidize h2, releasing methane.

c. False

This statement is incorrect because the DNA of bacteria is circular without histones.

Explanation:

a. True

Some archaea have very specific lipids in their membrane. Differently of the bacterias that have usual lipids in their membranes.

b. True

Archaebacteria do not have peptidoglycans in their cell wall

d. True

Methanogenic archaeobacteria are those that use carbon dioxide and hydrogen to produce methane. They are found in the digestive system of ruminants, sewers and swamps.

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evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.