What causes most pollution?

Choose the molecule that is described by each phrase. energy used during long activities:

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids