When testing tonicity of red blood cells, if the solution became opaque after adding blood cells, you could assume

The solution was hypertonic and that the cells had burst.

Explanation:

she forgot to record a transaction

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.