The correct answer is bacteria. Bacteria abundant in soil is the main source of its organic matter. This is because bacteria release energy in their systems which causes the soil to be more fertile and more capable of sustaining plant material. Without bacteria general processes of soil formation will not be possible.
A, b, and c are all correct.
take for example finches off of the galapagos islands. they vary from island to island, yet are still the same bird. on one island they have bigger, more durable and stronger beaks, because that island has many nuts to crack open and eat. on another island, they have thin ling beaks, ideal for pecking at insects in the grass on tree bark. evolution is literally survival of the ifttest, where those equipped best will live and those without means to fight for life will die off, leaving those most capable of reproduction and passing down genes.
Some viruses contain both DNA and RNA as their genetic material is NOT true of viruses (option D).
<h3>What is a virus?</h3>
A virus is a non-living entity that needs a suitable host to reproduce its genetic material (DNA or RNA).
Viruses may contain a genetic material composed of other DNA or RNA but not both.
In conclusion, some viruses contain both DNA and RNA as their genetic material is NOT true of viruses (option D).
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