In a dihybrid cross, individuals in the p generation differ by how many traits?

The correct answer would be two traits.

Dihybrid cross is the one in which two organisms are being crossed which differ in two observable traits.

For example, a cross of pea plant with round and green seed with a pea plant which has wrinkled and yellow seeds.

Thus, the two traits would be the color of the seeds and shape of the seeds.

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 .. .

feral cats are estimated to eat tens of millions of native animals each night in australia