Could two humans (or two cows) have some differences in their DNA sequences for insulin, yet still make the exact same insulin proteins

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

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

In each transformation of energy , some energy what?