Identify which of the fossils would be INDEX fossils in this example of a cross section of rock a. bone and shell
b. bone and teeth
c. shell and leaf
d. leaf and teeth

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

Table sugar completely dissolved in water is an example of a?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)