2. Which systems (2) are directly involved in the digestions (mechanical and chemical) of food?
3.
Which systems (2) control responses to internal and external environments?

2. liver, pancreas oesophagus.

3. cells specifically receptors, and effectors ( not sure)

the bald eagle got 50 because everything gets 10% of what they consume and since 50 is ten % of 500 hundred that means the   grasshopper had to have consumed a plant with 5,000 calories of energy

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.