What is the atomic mass of any given element?

only the neutrons in the atomic nucleus

only the protons in the atomic nucleus

the sum of all protons and neutrons in the atomic nucleus

the sum of all electrons in the atomic nucleus

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

The tubes transporting minerals and water upward are called ?

What is the cause hearing loss in human being