Examlex
Cepheids are good examples of cataclysmic variable stars.
Neurotransmitters
Chemical substances that transmit signals across a synapse from one neuron to another neuron or target cell.
Protein Molecules
Complex molecules composed of amino acids that are essential for various biological functions in living organisms.
Chromosomes
Structures found within cells that contain genetic information (DNA) passed from one generation to the next.
Genes
Units of heredity made up of DNA that carry instructions for producing proteins that determine the characteristics of an organism.
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Q81: The 3 K background radiation represents<br>A) the
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Q123: The dark halo is now believed to
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