Here is a model of the Sun-Earth system at a certain point in the Earth’s orbit around the Sun. Based on the model, which statement best explains why point A is
experiencing summer?
A. Earth's northern hemisphere is tilted toward the Sun.
B. Earth's equator is receiving the least direct rays of sunlight.
C. Earth's south pole is receiving the most direct rays of sunlight.
D. Earth's southern hemisphere is tilted toward the Sun.

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.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

What volume would 2.25 moles of ne has occupy at stp?