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.

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

d. organisms have cells with different shapes and functions.

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.