Answer:
The correct option is c ( <span>sexual reproduction joins two cells that each have half the total chromosome number).
Reason:
Meiosis occurs only in reproductive cell in which the number of chromosome reduce to half. This phenomenon is very imoportant and essential for maintaining the number of chromosomes in species.</span><span />
Carbohydrates is the correct answer :) hope I helped!
Nitrogen has 7 protons
Isotope has 6 neutrons I think
Ion has 6 electrons