Examlex
Which of the following have the same number of valence electrons?
Placental Cells
Cells that make up the placenta, an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply.
Muscle
(1) A tissue specialized for contraction. (2) An organ that produces movement by contraction.
Donor Cells
Cells taken from one organism or individual to be used in a medical treatment or scientific research in another.
Nutrient-limited Media
A growth medium with insufficient quantities of one or more essential nutrients, used to study microbial growth and the effects of nutrient restrictions.
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