Which two Domains have ONLY unicellular organisms?​

The correct answer is - Archaea and Bacteria.

Explanation:

There are three different domains of life on earth; Archaea and Bacteria are two domains that are completely single-celled prokaryotic cells that lack a nucleus and other double-membrane organelles.

These both domains are very much similar and has their own difference to be categorized in two other domains. The eukarya domain on other hand has different kinds of organisms like unicellular to multicellular organisms.

dz nuts.   eeneneneeenenne

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.