In humans, free earlobes (E) are dominant over attached earlobes (e). A heterozygous free-earlobes male marries a female with attached earlobes. What will be the expected ratios of the phenotypes and genotypes of the offspring?
What are the expected ratios of the genotypes and the phenotypes of the offspring of two heterozygous free-earlobes parents.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

yes, because even though a theory has a  lot of evidence to support it, it is not always true

dna is a set of a gene held together by a chemical bond