Which statements describe processes involved in the accretion of planetesimals and protoplanets? Check all that apply. A- Both involve the melting of solid materials in the nebula.
B- Both involve the formation of solid particles from nebular materials.
C- Both involve the work of the gravitational push on nebular materials.
D- Both involve the trapping of gases and the clumping of masses of matter.
E- Both involve the growing of gas grains with the addition of atoms and molecules.

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

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.

In one or two grammatically correct sentences, write a definition for the term molecule geometry