All the scientific research and development should occur under strict restrictions and supervision. All scientific research and development should occur under strict restrictions and supervision.

"should be" would also work, but would sound more passive. Also, you might want to use "regulations" instead of "restrictions"

I hold this view for three reasons, which I will elaborate on in the following essay. I hold this view for three reasons, which I will elaborate on in the following essay.

I would suggest you list the three reasons here. Something like "I hold this view because of X, Y, and Z." There's nothing wrong with this sentence itself, though.

To begin with, science is a double-edged sword. To begin with, science is a double-edged sword.

For instance, genetic engineering can be used to increase agricultural yields by making plants more productive and more robust toin the face of environmental disadvantages. For instance, genetic engineering can increase agricultural yields by making plants more productive and more robust in the face of environmental disadvantages.

You might want to just re-write the final part of this sentence. It sounds like you're trying to explain that genetic engineering can increase the likelihood of plants surviving droughts and other events, and that might just be difficult to explain succinctly in this sentence. Still totally understandable, though.

The pandemic of Covid-19 has already shown the fatefuldevastating power of some viruses. The pandemic of Covid-19 has already shown the devastating power of some viruses.

"fateful" is just a very uncommon word to use.

Therefore, there must be enough restrictions and supervision on scientific research and development to prevent them from producing harmful results. Therefore, there must be enough restrictions and supervision on scientific research and development to prevent harmful results.

Shorter, gets to the point faster.

These experiments caused extreme misery on the prisoners though. These experiments caused extreme misery on the prisoners.

Thus, if there aren't enough restrictions on scientific research and development, we will whiteness more human test subjects suffering from incipient experiments. Thus, if there aren't enough restrictions on scientific research and development, we will witness more human test subjects suffering from incipient experiments.

I'm not sure if "incipient" is the word you want here, but it just depends on what adjective you want.

Thanks to modern restrictions on medical research, it is commonplace that products like drugs aretesting drugs on humans is strictly prohibited for tests on humans unless they drugs have been proven safe by multiple tests on animals. Thanks to modern restrictions on medical research, it is commonplace that testing drugs on humans is strictly prohibited unless the drugs have been proven safe by multiple tests on animals.

This can cause disastrous consequences if there isn't enough supervision and restrictions. This can cause disastrous consequences if there isn't enough supervision.

For instance, if researchers who invent a novel nuclear reactor have concealed all the security risks within it, power plants whichthat adopted it willould be enormously dangerous. For instance, if researchers who invent a novel nuclear reactor have concealed all the security risks within it, power plants that adopted it would be enormously dangerous.

Because wWithout them, we cannot prevent researchers from producing deadly results, useing inappropriate methods in their research, and indulge themselvesresearch methods, and engaging in academic misconduct. Without them, we cannot prevent researchers from producing deadly results, using inappropriate research methods, and engaging in academic misconduct.