Because an amino acid<span> cannot be </span><span>synthesized</span><span> by the organism, and it must be supplied in its diet.</span>
Uring this period he became acquainted with Osama bin Laden, a wealthy Saudi who had joined the Afghan resistance to the Soviets,
The biosphere is everything that makes up life like plants and animals for instance but ecosystem is all the living and nonliving factors that affect the area hope this helps
