Which of these are true about HIV? it is a retrovirus
it becomes part of the host cell's DNA
It is acute
It has a variable incubation period that can be very long
People with HIV never live very long after diagnosis
It can lead to the disease called AIDS
It infects immune cells, like the T cells

Which of the following are the functions of the skeletal system? blood cell production in soft marrow tissues and mineral reserves largest organ of the body for defense and support vitamin d production and pumping blood through vessels voluntary movement and contractile movement

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.

The negative impacts of nonnative species generally outweigh the positive impacts