(Q).
Q: By allowing blood levels of a hormone to be regulated within a narrow range, feedback loops contribute to maintaining what state? Choices: - hypothesis - hibernation - consciousness - homeostasis A:
(A).
homeostasis

(Q).
Q: What kind of reaction adds water to an organic molecule and breaks the large molecule into smaller molecules? Choices: - heat reaction - supplementation reaction - aerobic reaction - hydration reaction A:
(A).
hydration reaction

(Q).
Q: What are groups of tens to hundreds of thousands of stars held tightly together by gravity called? Choices: - elliptical clusters - elongated clusters - galaxy - globular clusters A:
(A).
globular clusters