Which of the following statements is a reason for not classifying viruses in one of the three

domains of life (bacteria, archaea, eukarya) rather than in a fourth separate domain?

a) some viruses can incorporate their genome into a host's genome.
b) viruses direct anabolic pathways of host cells.
c) viruses are obligate parasites.
d) viruses are not composed of cells.
e) all of the answers are correct.

The correct answer is D) Viruses are not composed of cells.

Explanation:

The reason why virus is not classified into the three-domain of life is that virus is not made up of cell and organisms that are present in the three-domain(bacteria, archaea, eukarya) are composed of cell.

Virus is only composed of nucleic acid and a protective protein coat called a capsid. So the virus is considered non- living when it is present outside the host because it does not show metabolic activities outside the host cell.  

They are considered living when they are present in the host cell because there they perform metabolic activities and they reproduce there. So the correct answer is D). Viruses are not composed of cells.

preservation because he preserves part of the land and preserves means save

explanation:

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]