A seed begins the germination process when it gets the CHOOSE ANSWER, temperature, and oxygen that it needs. As the seed absorbs water, the tiny seedling inside of the seed begins to grow and expand, CHOOSE ANSWERagainst the seed coat. The seedling must exert enough CHOOSE ANSWERto break through the seed coat and CHOOSE ANSWERthrough the soil. There must also be enough CHOOSE ANSWERfor the shoot to move against the force of CHOOSE ANSWER. CHOOSE ANSWERis the force that attracts all objects with CHOOSE ANSWERto each other. CHOOSE ANSWERoccurs when a plant turns toward or away from the pull of gravity. Because of geotropism, plant CHOOSE ANSWERgrow toward the pull of gravity as they push deeper into the soil. The plant CHOOSE ANSWERgrow away from the pull of gravity as they break through the soil and the stem grows into the air. Through the forces resulting from CHOOSE ANSWERpressure and geotropism, plants are able to do a lot of CHOOSE ANSWER. Plant roots can break apart rock and concrete as they grow CHOOSE ANSWERthe pull of gravity. A seed can break apart rock-hard soil as it expands due to CHOOSE ANSWERturgor pressure and the CHOOSE ANSWERof the seedling emerging from the seed coat.