Use what you have learned in the reading to answer the following question. the point of a compass needle points to Earth's north pole. The point in the compass needle has- A) the same polarity as Earth's north pole
B) the opposite polarity as Earth's north pole
C) no polarity
D) unlimited polarity

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.