What makes a fossil an index fossil A. The fossil does not contain trance of DNA
B. The fossil Connor be dated using radioactive dating
C. The fossil comes from an Anaimal that did not evolve
D the fossil was formed only during certain shot time period

A

Explanation:

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.