Amurder has occurred, and you are asked to solve it. the police bring you a sample from the crime scene of what they believe is the killer's dna and ask you for a chemical analysis. your study of this sample reveals the presence of adenine, thymine, ribose, and uracil, leading you to conclude that the sample is
a) pure dna.
b) pure rna.
c) probably a mixture of dna and rna.
d) probably a mixture of rrna and mrna.
e) definitely not from the killer.

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

Pink fur (p) is dominant to purple fur (p) in hamsters. two heterozygous pink hamsters are crossed. what is the probability that these two parents will have an offspring with purple fur? 2/4, 1/2 or 50% 1/4 or 25% 3/4 or 75% 4/4 or 100% there is no chance for this type of offspring