Which layer of soil is most likely of greatest importance to plant growth? a. O (organic matter) b. A (topsoil) c. B (subsoil) d. C (parent rock) Please select the best answer from the choices provided A B C D.

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genetic variation will increase because of a new habitat and food source.

explanation:

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .