Chlorine is a non-metal in Group 7. This tells us that it will produce ions that have a charge of... what?

Which type of stress results when two plates push against one another? a. compression b. tension c. force d. shear

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

What relationship exists between an enzyme and a catalyst?