A and B are the exact same option.
The answer is that the production of ethanol indicates anaerobic respiration.
Nuclear reactors use hydrogen and they are an up and coming energy source.
There are also hydrogen fuel cells.
Answer:
B. interconnected
Explanation:
All the systems in our bodies (humans are indeed animals) are connected with each other to create a functional being. The blood flows throughout the body, providing nutrients; the bones support the structure and protect the heart and lungs. They work together.
Why not A: The systems are all completely necessary. There's nothing extraneous in our bodies, because extraneous stuff takes up energy, and our biology is incredibly economical.
Why not B: They're not interchangeable. How would you like your bones to turn to blood? Uh-huh.
Why not D: They interact with each other consistently, so they're not separate or segregated.
What are your problems in bio?
Answer:
B I think
Explanation:
If not try D I know it's a if,then statement
