3: Hominids are the group of primates that includes humans, gorillas, and chimpanzees. In 1997 a team of scientistsdiscovered th
ree fossilized hominid skulls and other artifacts found at the dig site in Ethiopia. Since it is difficult todetermine the age of once living organisms, the scientists used radioactive dating on the igneous rock thatsurrounded the remains to determine their age. Why would scientists choose radioactive dating to determine the age of the igneous rock?
A: This method is an easier way to determine the age of rocks.
B: The procedure allows for the rock samples to be preserved.
C: This process provides scientists with the exact age of rocks.
D: The rate of decay in the rock provide an accurate way to calculate age.
C: This process provides scientists with the exact age of rocks.
Explanation:
Radioactive dating techniques are absolute dating methods that yields precise age of rocks. They are targeted at radioactive isotopes in rocks using their parent to daughter ratio.
Dating can either be absolute or relative
Absolute dating techniques like radiometric ones gives the precise age of rocks.
Relative dating techniques uses geologic events to place the age of earth samples.
When the scientist deploys radioactive measurement, he would be furnished with actual age of the rock.
The periosteum is one source of precursor cells which develop into chondroblasts and osteoblasts that are essential to the healing of bone. Other sources of precursor cells are the bone marrow (when present), endosteum, small blood vessels, and fibroblasts.
There is a 50 percent chance that daughters carry the gene and can pass it to the next generation. There is a 50 percent chance that a daughter will not carry the gene and, therefore, cannot pass it on. There is a 50 percent chance that sons do not have the gene and will be healthy.
