What happened to the shells in layers 2,3,4 & 5? A) the shells present in layer 2 were not present in layers after B) the shells present went through gradual changes and were present in all C) the shells present in layer 2 were under environmental pressures to evolve rapidly D) the shells went through punctuated equilibrium & were in a phase of constant changing

What did the first language sound like

Which experiment would most likely contain experimental bias

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.