The number of moles of a compound dissolved in one liter of a solution is called the

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

If two objects at different te, peraure are in contact with each other what happens to their temperature