Oxygen is an element in the sixth group of the periodic table. This means it contains 6 electrons in its valence shell. Therefore, to complete its octet, it will prefer to gain two electrons rather than to donate 6. This is why its valency is -2. The relatively easy to achieve octet makes Oxygen a reactive element.
All prokaryotic cells do not have a nucleus.
Eukaryotes, on the other hand, are cells with nucei.
I believe that would be photosynthesis
Answer:
D) It replaces a defective gene with a healthy gene
Explanation:
Gene therapy is the process of replacing defective genes with healthy ... genes to help the body fight or treat disease, or deactivating problem genes.
True.
Hope that helps and feel free to ask me more questions :)Brainliest??
