Alphabetical
nucleus
[noun]
1. [Atomic] A tiny, dense positively charged mass at the heart of an atom. The nucleus is composed of protons and neutrons, and contains nearly all of the mass of the atom while occupying only a tiny fraction of the volume. 2. [Cellular] A generally spherical structure encased in a double membrane that is found in most living eukaryotic cells. The nucleus contains hereditary information and directs the growth, metabolism, reproduction, and functioning of the cell.
Appears in modules:
- Atomic Theory I Detecting electrons and the nucleus
- Atomic Theory II Ions, neutrons, isotopes and quantum theory
- Atomic Theory IV Quantum numbers and orbitals
- Cell Division I The cell cycle
- Cell Division II Mitosis
- Cellular Organelles I Endosymbiosis and membrane-bound organelles
- Chemical Bonding Ionic and covalent bonds and polarity
- Comparison in Scientific Research Uncovering statistically significant relationships
- Creativity in Science How scientists decide what to study
- Defining Energy Forms of energy, conversions, and measuring
- Discovery and Structure of Cells Cell theory, prokaryotes, and eukaryotes
- DNA II The structure of DNA
- Earth Structure A virtual journey to the center of Earth
- Factors that Control Earth's Temperature Energy from the sun and greenhouse gases
- Franklin Chang Díaz Propulsion pioneer for future generations of astronauts
- From Stable Chromosomes to Jumping Genes The work of Barbara McClintock
- History of Earth's Atmosphere I The origin of the modern atmosphere
- Membranes I Structure and function of biological membranes
- Modeling in Scientific Research Simplifying a system to make predictions
- Nuclear Chemistry Radiation, half-life, and nuclear reactions
- Nuclear Chemistry I Radiation, half-life, and nuclear reactions
- Properties of Liquids Intermolecular forces, cohesion, adhesion, and viscosity
- Scientific Controversy Development and resolution of controversies
- The Nature of Scientific Knowledge What is it and why should we trust it?
- The Periodic Table of Elements I The periodic table
- The Periodic Table of Elements III Electron configuration
- The Periodic Table of Elements V Periodicity
- Thermodynamics I Caloric theory, latent heat, and the First Law of Thermodynamics
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