1.) D, All Of Them.
2.) A, Autotrophs.
3.) A, Vertebrates.
I hope this helps! (^_^)
Answer:
its the second option not 3rd.
B. is the correct answer. through mutation and sexual reproduction
The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number. The number of electrons in a neutral atom is equal to the number of protons.
