Which statement BEST describes scientific theories? O They are discarded every ten years.
They can never be changed.
They are not supported by data.
They can be modified.

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Which ofbthe following is a characteristic shared by both brazil and mexico

Which of the following areas has the highest population density?