As a child, you might dream one day of becoming an astronaut and, the next day, of becoming a ballet dancer — the possibilities are endless. Eventually, this wealth of choice is whittled down by external circumstances and internal interests. Similarly, precursor cells in early embryos make a series of stepwise ' decisions' governed by external forces and internal factors to generate the diverse array of cell types present in adult organisms.
PTELook at the text below. In 35 seconds, you must read this text aloud as naturally and clearly as possible. You have 35 seconds to read aloud.
Recorded Answer
Current status:
Beginning in 35 seconds.