Final Synthesis. Describe how a cell that is FIXED can be used to estimate the time spent in the phases of mitosis. Explain the process you used to determine the times for each phase.

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Which blood cell spend most of their time in the lymphatic system?

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.