Plant and animal cells are very similar because they are both eukaryotic cells.
Well humans and monkeys are known to have fingers
Oxygen-16 and Carbon-12 are stableisotopes of elements O and C respectively. Hence, they do not have half-lives. But Carbon-14 andUranium-238 are radioactive isotopes. Among them Carbon-14 has relatively short half-life as about 5730 years while Uranium-238 has a long half-life as about 4.5 billion years.
Answer is. uranium-238
You can say it as "Constituent Particles" in another term..
