Which of the following is one of the basic principles of social stratification?
a. low-level groups often have basic access to the rewards and privileges of higher-level groups.
b. it is maintained through beliefs that are widely shared in a society.
c. all societies stratify according to wealth accumulation.
d. families’ social positions start anew with each new generation.

If many different species live in an ecosystem, this the ecosystem to fill its a. populations b. niches c. producers d. communities

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis