sugar molecules can be transported across the cell’s plasma membrane with the help of which biomolecules?

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

Number and variety of living organisms includes genetic, species, and ecological types

Can someone i have no idea of how to do this.