Hiv is a retrovirus which contains rna as its genetic material. once hiv enters the body, it attaches to t cells that other lymphocytes respond to infection. gradually, hiv kills off most of the t cells. the rna is inside the capsule of the virus and is labeled a) a. b) b. c) c.

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.