Answer:
Advanced,
Decomposers, producers, consumers
Skin
Explanation:
Decomposers are primary energy source by decomposing matter, this energy is released to the soil for plants absorb it to manufacture their food through photosynthesis and these food are consumed by man who gains energy in the process.
Higher layers should have more complex features than lower layers.
Answer:
A. movement of molecules across a semipermeable membrane against a concentration gradient with a protein
Commonly called the enterics due to the fact that they inhabit the intestinal tracts of humans and other animals.
