Examlex
Explain why the solar "constant" actually varies over time.
Nucleus
The central and most important part of an atom, containing protons and neutrons, or a membrane-bound organelle in cells containing genetic material.
Chromosomes
Thread-like structures located inside the nucleus of animal and plant cells, made of protein and a single molecule of deoxyribonucleic acid (DNA).
Genes
Sequences of DNA that code for proteins and determine the characteristics and inherited traits of organisms, playing a crucial role in biology and genetics.
Deoxyribonucleic Acid (DNA)
The chemical structure, shaped like a twisted ladder, that contains all of the genes.
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