What do bacteria and humans have in common that makes it possible for a human gene to be expressed in bacteria?

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?