Metabolism is
a. a measure of the hydrogen ion concentration in a solution
b. the energy required to start a chemical reaction
c. all of the chemical reactions in an organism required to sustain life
d. a chemical reaction in which the substrates trade constituent parts

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

What is the difference between how ionic and covalent bonds form