All pets in a household should be treated with an insect growth regulator to prevent the development of immature stages of the flea. (medi-vet.com)
To his surprise, the mutation arose only in immature muscle cells that occur mainly in early development. (protomag.com)
Modern research has demonstrated that the brain also contains stem cells, a supply of immature cells that can be called on to grow, differentiate and become new neurons. (ellisonfoundation.org)