How would technological advances in health care benefit people in developing countries

Which part of the female reproductive system produces sex hormones and contains eggs? the uterus the ovaries the vagina the fallopian tubes

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer

If human development really does proceed continuously, what value does stage theories of development have?