Acarbon molecule that has a different arrangement of atoms is known as a/an
a. isomer.
b. nucleotide.
c. peptide.
d. monomer.

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

Which of the following units is not an official si unit

How many neutrons does an element have if its atomic number is 50 and its mass number is 166