Answer:
b. Chi Squared
Explanation:
The chi squared test is best to find signifigance between differences in observed and expected values.
Chemical change because changing is chemical and as your food goes down, it doesnt come out looking the same way it did when it went in
Your answer is c. fold. plz make me brainliest if you can
Answer:
Dorsal lol, its contracts and pumps blood to the aortic arches.