Answer: Most rocks do not contain organic material-most fossils are not organic anymore. One of the most common isotopes used in radiometric dating is uranium-235 or U-235. ... This makes it useful for dating rocks that are very old. Radioactive isotopes with short half-lives cannot be used for dating old rocks.
not 100% sure :/
Answer:
I'm not entirely sure, however, since no one has answered your question yet, I'll say A. Mobility
This thing probably moves around, and it doesn't look like it could protect it, or anything.
Male and female cones Pine trees are angiosperms so they reproduce by using cones. When one grows to adulthood they produce cones to produce eggs and sperm So Fertilization
Well in the scientific method you have to observe, hypothesis, prediction, experiment and conclude. So will you provide the answers if there is any multiple choice questions please post so I can help more.
