Which of the following is NOT a factor that makes studying in human development difficult?
A - The small size of the early human embryo
B - The brief gestational time of humans
C - Ethical limitations on human research
D - Human embryos develop inside the mother
Answer: B - The brief gestational time of humans
The gestational period in humans is long, which slows down the pace of research and normally hum,ans only create one or two at a time.