What does the principle of superposition scientists determine? a. the super powers of a rock layer b. the position of a fossil c. the relative age of a rock layer d. the exact and absolute age of a rock layer

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

Plz ! a frog has a genetic mutation in skin cells that causes part of its skin to turn orange the frog will not pass this genetic mutation onto its offspring because, a. the offspring will inherit skin cells from the other parent. b. mutated skin cells cannot divide and produce daughter skin cells. c. skin cells do not contribute genetic material to sex cells. d. parents do not contribute genetic material to their offspring.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation