Examlex
Atomic spectra are due to changes in the energy of _______.
Dizygotic Twins
Also known as fraternal twins, these are produced from two separate eggs fertilized by two different sperm cells.
Fertilized
The penetration of an egg by sperm, initiating the development of a new organism.
Chromosomes
Thread-like structures located within the nucleus of animal and plant cells, made of protein and a single molecule of DNA, which carry genetic information.
Chromosomes
Structures within cells that contain DNA and genetic information, determining hereditary traits.
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