What are Cyanobacteria ?

Cyanobacteria are photosynthesizing bacteria that may produce cyanotoxins that can cause illness to exposed human and animal populations. ... Cyanobacterial cells may be found at the water surface, at a defined depth, or present throughout the water column.

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.