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.'

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

a symbiotic relationship with the mitochondria