Which adds evidence to the idea that cells are the basic units of life? a. cells contain ribosomes and have a cell membrane. b. it is impossible for a multicellular organism to survive. c. many organisms in the world are made of only one cell. d. small organisms are generated spontaneously.

The answer is; C

Examples of these organisms that are made of a single cell are bacteria and protists. This means that the cell is the simplest functional biological unit that can perpetually support life. Multicellular organisms are composed of many cells, while these cells remain the same simple functional units that coordinate different functions and form tissues.

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.