Aphenotype that results from a dominant allele must have at least dominant allele(s) present in the parent(s).

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation