Check all that apply. some of the characteristics that make a good index fossil are:

the organism lived over a wide area

they lived for long periods of time

they lived for fairly short periods of times

the organism was in abundance

Heredity has an impact on personal health, but environmental factors are important as well. select the best answer from the choices provided

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

How does the study of genetic disorders such as pku biologists understand normal alleles?