the answer is 21<span>% oxygen, </span>
Answer:
when organisms use organic matter for cellular respiration all that matter goes back into carbon dioxide, water, and minerals, while ALL the energy leaves the ecosystem as heat.
Explanation:
prokaryotic cells do not have a nucleus.
<span>The diencephalon transmits sensory data
among the </span><span>brain sections
and manages several autonomic functions of the </span>peripheral
nervous system<span>. It also links the anatomy of the </span>endocrine
system with the nervous system and function in
coexistence with the limbic system structures
to produce and control memories and feelings.
