Which of the following compounds has a stereoisomer? a) Butane
b) 2-chlorobutane
c) 1-chlorobutane
d) 2-bromo-2-chlorobutane

List the two type of transporst that the cell in orde to transport molecules acroos the membrane

What is the name of this hydrocarbon?

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