All the major organs of the body are formed by week 10 of gestation. which process makes this possible?
a)growth
b)fertilization
c)self-renewal
d)differentiation

Ans.

Embryonic development involves process of formation and development of an embryo.  In humans, during the early stages ( by 10 weeks) of embryonic development, all the major body organs are formed. The process involves in the formation of these organs is cell differentiation.

During differentiation, the non-specialized, embryonic cells  become specialize and form diverse tissue or organs, which is the key to the development of embryo into fetus.  

Thus, the correct answer is option d). 'differentiation.'

answer; /// the shaft of the hair consists of dead cells;