Which statement is true about a scientific theory? Theories are based entirely on logic, and creativity plays no role in their development.
Theories cannot be discarded because they are based on sound science.
Theories are set in stone and cannot be changed.
Theories can be revised as new knowledge expands our understanding.

Theories can be revised as new knowledge expands our understanding.

Explanation:

A scientific theory is based on observations and logic that provide a valid answer to the question related to the world.

Scientific theories can be revised and change over time when a person encounters with new knowledge and helps to expand our understanding. Changes in scientific theories are the result of new scienctific observations and deep investigation about the context. The old theory can be revised as  a new theory become dominant over old and gives a new perspective to people.

Hence, the correct answer is "Theories can be revised as new knowledge expands our understanding."

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation:

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."