How many chambers does the heart contain?

When two movable joints meet at a joint, their do not touch one another.

Which food preservation method can people use at home? a. fermentation b. irradiation c. pasteurization d. thermal processing

Which practice is harmful to the land? a. using animal waste as fertilizer b. composting with peels from commercial fruit c. throwing paint cans in the garbage d. cutting the lawn with a gas-powered mower