Which of the following best describes evolution?

a. indivuals compete to survive and only change as a result of competetion
b. indivuals with traits best suited osurvival pass these traits to offsprings
c. indivuals acquire certian traits during their lifetime and pass these to their offspring
d. indivuals change over time as earth's enviorment changes

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.

a bird that nests only in a particular tree species.