What type of energy transformation takes place when carbon is cycled during cellular respiration?

chemical energy to chemical energy
chemical energy to electrical energy
mechanical energy to chemical energy
mechanical energy to mechanical energy

Which structure in the cardiovascular system connect arteries to veins?

True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.

Si units are the modern form of the