Who's contribution was the most important in the development of modern cell theory

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

What is used to keep track of the gamates and possible offsprings combination

9. the history of life on earth is recorded in