Answer:
a nucleus of Deuterium (2H)
Explanation:
formed from two protons with the emission of an antielectron and a neutrino. In the basic Hydrogen fusion cycle, four Hydrogen nuclei (protons) come together to make a Helium nucleus.
Answer:
Ecdysis is the moulting of the cuticle in many invertebrates of the clade Ecdysozoa. Since the cuticle of these animals typically forms a largely inelastic exoskeleton, it is shed during growth and a new, larger covering is formed. The remnants of the old, empty exoskeleton are called exuviae.
Explanation:
Eukaryotes usually contains a nucleus
Answer: <span>Marbles placed inside a hollow sphere are used to describe protons in a nucleus.
Models are artificial representations used to show some phenomena or features of the real world.
In this case, it has been used a sphere and marbles, to represent the fact that nuclei of atoms contain inside some smaller partilces which are the protons.</span>