Why do scientific theories change over time?

Choose the best answer.

A. new technologies are developed

B. new discoveries are made

C. new research is conducted

D. all of the above

Which statement describes the movement of crust in a normal fault? Movement occurs equally in vertical and horizontal directions. Movement is mostly in a vertical direction. Movement results in the shortening of crust.

What's the function on tRNA

How do unicellular organisms and multi cellular organisms compare in meeting their needs to stay alive

The blank was not a direct result of the industrial revolution

Which type of marine ecosystem do you think supports the least life? Explain your answer.

What is the genotype for individual D

Are aliens and UFO's real

What happens once intercelluar signals reach the inside of a cell using some type of receptor? the signal stops. the signal is transferred to the cytoplasm. the signal produces protein. intracelluar communaction takes over.

What is extinction and why does it occur?

Corn smut and wheat rust are crop diseases caused by fungi.