Cyanide prevents oxygen fromaccepting electrons at the end ofthe electron transport chain. Oneof the first symptoms of cyanidepoisoning is unconsciousness. Which of the following is a logicalexplanation for why the brain isaffected by cyanide more than therest of the body?

a. The brain runs out of oxygenbefore the rest of the body does.
b. Cyanide prevents oxygen frombeing used in the brain.

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water