Adog breathes out co2 and a tree releases o2. how are the dog and the tree connected in the oxygen cycle?

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

Number and variety of living organisms includes genetic, species, and ecological types