Changes

**Camoflaged in the environment

**Camoflaged in the environment

*Methoprene the juvenile development hormone coordinates the growth of the immature stages

*Methoprene, the juvenile development hormone coordinates the growth of the immature stages

**Activates genetic switches

**Activates genetic switches

**Determines the sequence of tissue and organ development

**Determines the sequence of tissue and organ development

*Newly emerged adults do not leave the cocoon straight away

*Newly developed adults do not leave the cocoon straight away

**The '''pupal window''' is the time that it takes for the adult to emerge

**The '''pupal window''' is the time that it takes for the adult to emerge

**Temperature determines when the adult fleas emerge

**Temperature determines when the adult fleas emerge