What is the first step in a life cycle of a plant reproduce sexually

What is a codon and where is it found

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

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above