What is the superposition of strata theory?
1. that oldest layers of sediment in rock formations are found under more recent layers
2. that sedimentary rock is composed of bits of rock eroded minerals
3. that the Earth's is composed of a core, mantle, and crust
4. that rock strata has been laid down for 4.6 billion years

answer:

Your answer is D. that the Earth's is composed of a core, mantle, and crust

Explanation:

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what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.