Lewis Structures & Molecular Geometry: A. Draw Lewis structures for the following molecules.
B. Identify the molecular geometry. (bent, linear, trigonal planar, tetrahedral).
C. State whether they are polar or nonpolar.
NH3 oxygen (O2)

CF4 CH4

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

Aside from human impact, which of the following causes less water vapor production over a small area? (2 pderivartin

Which position represents spring in the southern hemisphere? a) b) c) d)