Variations in the Earth's orbital rotation have caused major changes in the history of Earth's climate. These types of changes
are caused by
-natural processes.
-human activities.
-natural processes and -human activities.
-population cycles.

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

How many miles of water are produced if 5.43 mol pbo2 are consumed

What is i fracture in the crust called when land move up, down or sideways