The reason why haplotype blocks are still useful on current populations is because
a) some of our human ancestors interbred with neanderthals.
b) new mutations cannot be introduced into existing haplotype blocks.
c) they are still preserved in their original ancient configurations.
d) disease genes are found in haplotype blocks.
e) modern humans descended from a relatively small population of about 10,000 individuals that existed about two thousand generations ago.

D) disease genes are found in haplotype blocks.

Explanation:

Given the high allelic variability in the human genome, the probability that two unrelated individuals have the same haplotype is virtually none. This is why the study of haplotypes has become a useful tool in the determination of the genetic relationship between individuals, and therefore in the study of the origin of mutations causing various diseases.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.