Which of the following properly describes an ion? O an atom or molecule that has lost or gained one or more electrons

O a molecule that has lost or gained one or more atoms

O an atom or molecule that has lost or gained one or more protons

O an atom that has lost or gained one or more neutrons

Number and variety of living organism; includes genetic, species, and ecological types

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species