Viruses have all of the characteristics of living things except
a) cells.
b) organization.
c) replication.
d) response.

The answer is A/Cells

Explanation: Viruses have no cells, but they need to occupy cells to survive.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.