Answer:
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hope it helps
This statement is true, mainly because it's easy to tell which species are to be classified as what and it would be easy to classify new species by taking characteristics and applying them to already existing species.
HIV is a retrovirus which contains RNA as its genetic material. Once HIV enters the body, it attaches to T cells that help other lymphocytes respond to infection. Gradually, HIV kills off most of the helper T cells. The RNA is inside the capsule of the virus and is labeled A.
The temperature stability of earth’s atmosphere is mostly due to "b. the rotation of earth about its axis," which is the reason why we have seasons. Water also plays a role.
