Several new tetraploid species of plant known as the salsifies have arisen inwestern north america from diploid species by allopolyploidy. this mode ofspeciation is known as and it occurs (1 point) a. allopatric speciation; almost instantaneouslyb. allopatric speciation; very slowlyc. sympatric speciation; almost instantaneouslyd. sympatric speciation; very slowlye. adaptive radiation; very slowly

C. sympatric speciation; almost instantaneously

Explanation:

When new specie is evolved from the ancestral species which are surviving, this type of specification is called as Sympatric Speciation. Both ancestral and evolved new specie continue to live in the same geographical area.  For example

In the question above a new tetraploid species of plant known as the salsifies have evolved in western North America from  ancestral diploid species by allopolyploidy.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.