The answer is : randomization was not used in sample selection. The major difference between experimental and quasi-experimental designs is lack of randomization in sampling selection.
Make a punnet square
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All wrinkled seeds, no smooth seeds but they are all carriers for the smooth gene
Parenchyma cells synthesize and store organic products.
Housing impacted slaves as they were forced to live in small quarters. diseased spread rapidly and the quarters were always dirty. they had no personal space. disease was rampant and there was no cure for them. most slave owners did try to help the slaves because they were valuable property but disease was still an immense problem.
