An example of an atom that has no charge is one that has a. 3 protons, 1 electron, and 3 neutrons. b. 3 protons, 2 electrons, and 1 neutron. c. 2 protons, 2 electrons, and 1 neutron. d. 1 proton, 2 electrons, and 3 neutron

Protons have a (+) charge, Electrons have a (-) charge, and neutrons have no charge. An example of an atom that has no charge -which is just a normal atom- is one that has 2 protons, 2 electrons, and 1 neutron.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms