Fossils up to 75,000 years old can be dated with Carbon-14.
Radio isotopes can be used for the age determination of the fossils. Carbon-14 is a common isotope which is used for that purpose. But the half- life of the Carbon-14 is relatively small as 5730 years. That means the amount of Carbon-14 will be half after every 5730 years. Hence, decay is very fast. So Carbon-14 cannot be used forage determination which is more than 75000 years due to the low accuracy.
Mitosis is probably the type of reproduction taking place because it deals with a sperm and an egg it is called (sexual reproduction)
I believe this is T. Because i just learned that in science not that long ago, and deciduous forests have small winters and long growing seasons, and the small winters have lots of snow, and the long growing seasons have lots of rain.