Examlex
Which of the following is the basic structural unit of living organisms?
Genes
Units of heredity made up of DNA, responsible for guiding the process of creating the proteins that make up physical structures and regulate bodily functions.
Sperm and Ovum
The male and female gametes, respectively, whose union during fertilization results in the formation of a zygote, leading to pregnancy.
Zygote
The single cell formed from the union of two gametes, a sperm and an ovum.
Fraternal Twins
Siblings born at the same time from two separate eggs fertilized by different sperm cells, resulting in genetically unique individuals.
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