Choose all the answers that apply. Why does the Earth orbit the sun? The Earth is moving and therefore must stay in motion The sun's gravitational pull keeps the Earth in a curved orbit The speed of the Earth's motion keeps it from crashing into the sun.
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Plz ! a scientist wants to produce a cow that makes a particular human protein in it’s milk the desired protein causes blood to clot and can be used to treat hemophilia (a blood clotting disorder). which of the following would be best for the scientist to use? a. genetic crosses. b. cloning. c. selective breeding. d. genetic engineering.

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.