The domains archaea and eubacteria are similar in
thatall
a. live in extreme environments
b. carry on photosynthesis
c. lack a nucleus
d. carry on aerobic respiration
would the answer be c. lack a nucleus?

The correct answer is C. lack a nucleus

Explanation:

Eubacteria are bacteria which is different from archaea but both archaea and bacteria are considered to be in prokaryotes however they both are divided into two different domain that is bacteria and archaea.  

Bacteria and archaea are prokaryotes because they lack membrane-bound nucleus so their genetic material is scattered in the cytoplasm. Eukaryotes are organism which have their genetic material enclosed in a membrane-bound nucleus. So the similarity in archaea and eubacteria is that they both lack a nucleus.

liquid crystals are matters in a state which have properties between those of conventional liquids and those of solid crystals[1]. liquid crystal is partially ordered and anisotropic. in terms of molecular order, liquid crystal molecules have one-dimensional or two-dimensional long - range order.

the answer would be d