Electron;neutron
Because the neutron has no charge with mass.
the electron has a negative charge but no mass, because it is in the electron cloud.
There is no set lifespan.It can live as long as the environment can support its life. However the average lifespan differs for each particular species, with an average life expectancy from a few days to a year or two.
:)
A is a correct answer.
Dermis is does not had contain significant amounts of the protein collagen.
Hope it helped you.
-Charlie
<span>The challenge of reproducing is one of important manners which distinguishes migratory birds from another birds. The question is that which examples descrbe such manners, and for that, we can choose A, C and D</span>
