Wavelength is the property that differs between colours.
Amplitude is the property that differs between light of different intensities.
Smallpox- began Africa, spread through trade and human interaction.
Chestnut blight-isn't this a chestnut found in America?
The sender is.....Nucleotides. DNA is made of chemical building blocks called nucleotides.
Hopefully this will help and it's what you are looking for.
I believe he is looking for an allele
An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosomes. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
