Comment une molécule de gaz, l'oxygène, peut-elle voyager dans l'organisme?

Why do bacteria thrive even in hostile environments

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems