After 3 half lives how much of a radioactive substance will remain

1/16

1/4

1/2

1/8

How does a catalyst work? A - by increasing the temperature of a chemical reaction B - by decreasing the pressure of a chemical reaction C - by increasing the concentration of reactants in a reaction D - by decreasing the activation energy of a

A fossil was found and determined by radiometric dating to be 11,400 years old. what is the ratio of carbon-14 to carbon-12 in this fossil compared to its environment?

Are the smallest of all living on earth

A scientist wants to make a dna fingerprint and she has used polymerase chain reaction pcr and restriction enzymes. What should her next step be

A person is declared to be dead upon the irreversible cessation of spontaneous body functions: brain activity, or blood circulation and respiration. However, only about 1% of a person's cells have to die in order for all of these things to happen.

Whats the difference between Phylum and Genus

What tool is used to measure the movements of paramecium

How are earthquakes and volcanoes related

How does the color of light affect the rate of photosynthesis

What does the term "unzipping" refer to in dna replication? a. polymerization b. breaking hydrogen bonds c. the movement of dna polymerase d. matching complementary nucleotides user: dna replication occurs a. so that a cell can grow. b.