Cells need to bring in molecules to carry out cellular processes. Often, this requires molecules moving across the cell membrane with the concentration gradient. How do these molecules get into the cell?

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

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.

List charasteristics of athenosphere