Which cells of the immune system are affected by HIV and leukemia, and what parts of the immune response do these cells influence?

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

Which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton

What could happen if two base pairs on a strand of dna or switched