Which of these statements is true?
quarks pair with leptons to form protons and neutrons.
quarks pair with bosons to form photons.
quarks pair with photons to form protons and neutrons.
quarks pair with other quarks to form protons and neutrons.
quarks pair with electrons to form protons

Quarks pair with other quarks to form protons and neutrons.

Explanation:

Every atom contains a nucleus and within the nucleus, protons and neutrons are present.  A quark is the fundamental particle of a matter. Quarks are joined together to form hadrons. Protons and neutrons in the nucleus of an atom are hadrons.  Thus, quarks are the smallest particle of a matter as believed by most of the physicists.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: