Solar energy
Heat energy (radiation)
are your answers
hope this helps
3.1+2.7+4.6+1.9+8.7=21
21:5=4.2
The average is 4.2
Cell theory is based on microscopes, as we know cells are very small in size and cannot be seen with a naked eye, so if microscopes had not been invented, cell theory would have not been developed as it is today
Hope this helps!
Urea s a waste product that normally diffuse across the placenta from the embryo to the mother.
The important point is that the surface area<span> to the </span>volume ratio<span> gets smaller as the </span>cell<span> gets larger. Thus, if the </span>cell<span>grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased </span>cellular volume<span>.</span>
