Which element is always found in proteins but not in carbohydrates or lipids?

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

How do you date a sample of rock that you suspect as being one of the earliest on earth

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.