4. Dating objects allows scientists to figure out the age of events. A. What is the difference between relative dating and absolute dating? (2 points)
B. What is a half-life? (5 points)
C. How do scientists figure out the age of a substance using radiometric dating? (3
points)

Describe the impact of deforestation of both abiotic and biotic factors within the tropical rainforest.

In an hydrogen ion pump the energy is used to join small molecules together to make larger ones which factor most likely has the greatest effect on the number of molecules mitochondria can produce

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.