Examlex
_____ is the understanding that objects continue to exist when they cannot be seen.
Zygote
The initial cell formed when a sperm cell from a male fertilizes an egg cell from a female, marking the beginning of a new organism's development.
Chromosome
One of the 46 molecules of DNA (in 23 pairs) that virtually every cell of the human body contains and that, together, contain all of the genes. Other species have more or fewer chromosomes.
Involuntary Response
A reflex or action that occurs automatically without conscious thought, often as a result of a stimulus.
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