Question

Mary has to choose between a job and learning French during summer

break. What will be the opportunity cost if she wants to study French?
o
having the opportunity to study French
losing the opportunity of a summer job
paying for the French lessons

Answer 1

losing the opportunity of a summer job

Explanation:

Opportunity cost is the foregone alternative. So she has to forgo the opportunity of a summer job, to have the opportunity to study French. This means that the opportunity of a summer job is the foregone alternative which is the opportunity cost.

Answer 2

To develop a molecular clock, you need to find which of the following?

a sequence of molecules

the rate at which changes occur in a type of molecule

how much total change has occurred in a type of molecule from two different species

how many molecules a species has

Explanation:

To develop a molecular clock, you need to find which of the following?

a sequence of molecules

the rate at which changes occur in a type of molecule

how much total change has occurred in a type of molecule from two different species

how many molecules a species has