How much energy is lost at each level of the food chain?

Identify the advantages and disadvantages or renewable and nonrenewable energy resources

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?

Anita thinks that she has heterozygous alleles for red hair. if she is correct, which of these diagrams best illustrates anitas alleles pf red hair