12. (07.04 LC) Which body system produces movement by contracting and relaxing? (4 points)
Integumentary system
Skeletal system
Synovial joint system
Muscular system

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.

Based on their relative positions in the periodic table, which two elements would have the same number of valence electrons?

Why is hemophilia more common in males than in females? a. hemophilia is more common in females b. affected males only need to inherit one copy of the allele c. hemophilia affects only males