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Why does the government's role of enforcing contracts facilitate exchange?
Conception
The process of fertilization where a sperm cell unites with an ovum, leading to the formation of a zygote and the start of pregnancy.
Chromosomes
Threadlike structures located inside the nucleus of animal and plant cells, made of protein and a single molecule of DNA, carrying genetic information used in growth, development, and function.
XY
A 23rd chromosome pair that consists of an X-shaped chromosome from the mother and a Y-shaped chromosome from the father. XY zygotes become males.
Chromosomes
Threadlike structures made of DNA molecules that contain the genes and are located in the nucleus of cells.
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