Which of the following best describe the main function of the cyrculatori system ? a. to deliver nutrients an other essential material to cells an remove waste products

b. to break down the nutrients found in food so that they can be used by all cells in the humand body

c. to produce the chemical signals that allow parts of the humand body to communicated over long distances

d. to coordinate all others humand body system so that they can function together to maintain homeostaisis

How manyatoms of mercury are in 1.4214e+1 ml sample

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.

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !