6. Oxygen ordinarily has 8 protons and 8 neutrons. Another rare form has two extra neutrons. These two forms are:
A. oxygen ions
B. oxygen isotopes
C. oxygen compounds
D. oxygen shells
E. oxygen orbitals

When the starfish had been eliminated from the location as a part of an experiment, the mussel populace swelled and crowded out different species. The biodiversity of the environment turned into notably reduced. Payne's look at confirmed that figuring out and shielding keystone species can assist hold the populace of many different species.