The riskiest sexual activity for contracting hiv is

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast

In cattle a single gene with two alleles determines fur color the fur can be red white or roan roan fur has both red and white hair which of the following statements is true a the allele for roan fur color is dominant over red and white fur color b the allele for red fur color is dominant over white and roan fur color c the roan and white alleles are expressed independently of the other d the red and white alleles are expressed independently of each other