Explanation:
HIV virus is an RNA virus
A forest station can be a base in a forest where people monitors different biological aspects, like the fauna and the flora of their interest. For example, a forest station can be useful for monitorin endangered species.
A trilobite. Trilobites became extinct about 250 million years ago while a ammonite became extinct around the same time as dinosaurs(65 million years ago). You wouldn't find a human skull or a dinosaur footprint
Answer is thorax...
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