myofibrils
myoactin
ATP
The stimulus is rain, response is using an umbrella and the outcome is not getting wet.
yep its c have a nice day :)
answer is B. just had it myself
Answer: Mutation
Explanation:
A mutation is a random change in a cell's genetic code due to a variety of causes. The change can be small and insignificant, or it can be major. Mutations can be passed onto offspring through reproduction, thus increasing the genetic variation within a population.