Answer:
B is the answer
B. Improved living conditions resulted in a decline in the mortality
rate.
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Answer:
There are five basic modes of inheritance for single-gene diseases: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive, and mitochondrial. Genetic heterogeneity is a common phenomenon with both single-gene diseases and complex multi-factorial diseases
D. Lymph nodes are the filtering points throughout the body... found in the lymphatic system
