How was the cretaceous period different from the jurassic period? a. the jurassic period had angiosperms, while the cretaceous did not. b. pangaea split during the jurassic period. c. there were dinosaurs in the jurassic period, which went extinct in the cretaceous period. d. conifers and ferns were present in the jurassic period, but not in the cretaceous period

Which of these statements are true about scientific theories and hypothesis

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Tara sees a commercial for a brand of pills that promise to boost energy and people perform better in work and school. as people in the commercial talk about how much better they feel when taking the pill, tara notices a message on the bottom of the screen that reads, "this pill is not approved by doctors and has not been tested in controlled experiments." what is the best conclusion that tara should make about the commercial? it is making scientific claims based on subjective observations. it is making scientific claims based on opinions instead of pseudoscientific facts. it is making pseudoscientific claims based on objective observations. it is making pseudoscientific claims based on opinions instead of scientific facts.