1. D
2. D
3. A
4. A
Hope I helped :)
They wanted to find ways to benefit ordinary citizens.
Answer:Over the centuries, the Great Wall has been built and rebuilt for three main purposes: as kingdom border defenses, to defend China's northern border, and for tourism. Read on to see why China built, or did not build, the Great Wall in different historical periods.
Explanation:hope I helped!
Describe how messenger RNA performs its function. copies the coded message from the DNA in the nucleus, and carries the message to the ribosome in the cytoplasm. Transfer RNA exist in the cytoplasm and carries amino acids to the ribosomes during protein synthesis.
Johannes Kepler Discovered three laws of planetary motion.
