Only a and b the others are spread by bodily fluids
The lining of the uterus is shed during menstruation. Could also be nicknamed the womb
Answer:
Although the division between a colony with specialized cells and a multicellular organism is not always clear, around 1 billion years ago, the first multicellular plants emerged, probably green algae. Possibly by around 900 Ma true multicellularity had also evolved in animals.
the anwser is false Children miss behave even when their parents use positive parenting techniques