The ultimate source of energy for most organisms is the Sun.
Somatic cells or body cells of an organism undergo cellular division that maintains the number of chromosomes of the beginning cell prior to the division, this process is called mitosis.
a spiral ending in a serpent head
I believe it's A. because the bone matrix is where it goes, therefore the bone matrix is already there. it just maintains it
The assisted transport of a molecule through the cell membrane in deprived of expenditure of energy is facilitated transport. It transports molecules via specific trans membrane integral proteins because of being passive the facilitated transport does not directly require chemical energy from ATP hydrolysis in the conveyance step itself but rather molecules and ions move down their concentration gradient.
