Iron is concentrated in earth’s core because of the a. movement of materials due to heating in earth’s protoplanetary phase. b. sequence of accretion of material during earth’s formation. c. radioactive decay of isotopes in earth’s core to produce iron. d. penetration of iron meteorites to earth’s core when earth was smaller than it is now.

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.

What organelle other than the nucleus houses dna in a eukaryotic cell?

Long term exposure to waves can cause sunburns and skin cancer.