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- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/20%3A_Biogeochemical_Cycles/20.01%3A_Biogeochemical_CyclesSome other examples of reservoirs or pools for water you will encounter in the course include glaciers; the soil layer; the aggregate of bodies of fresh water on the continents (rivers and lakes). If ...Some other examples of reservoirs or pools for water you will encounter in the course include glaciers; the soil layer; the aggregate of bodies of fresh water on the continents (rivers and lakes). If the flux of material into and out of a given reservoir is the same for some period of time, that reservoir is said to be in a steady state.
- https://bio.libretexts.org/Courses/Monterey_Peninsula_College/Raskoff_Environmental_Science/02%3A_Environmental_Systems/2.04%3A_The_Chemistry_of_WaterDo you ever wonder why scientists spend time looking for water on other planets? It is because water is essential to life; even minute traces of it on another planet can indicate that life could or di...Do you ever wonder why scientists spend time looking for water on other planets? It is because water is essential to life; even minute traces of it on another planet can indicate that life could or did exist on that planet. Water is one of the more abundant molecules in living cells and the one most critical to life as we know it. Approximately 60–70 percent of your body is made up of water. Without it, life simply would not exist.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/01%3A_The_Chemical_Basis_of_Life/1.02%3A_Elements_and_AtomsThis page explains that elements are pure substances composed of one type of atom, crucial for life, with only around 25 of Earth's 90 elements being essential. It details atomic structure, focusing o...This page explains that elements are pure substances composed of one type of atom, crucial for life, with only around 25 of Earth's 90 elements being essential. It details atomic structure, focusing on the nucleus and outer electrons, which dictate chemical behavior, valence, and electronegativity. Elements with similar outer electron configurations share chemical properties and react to achieve stability.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/02%3A_The_Molecules_of_Life/2.02%3A_HydrocarbonsThis page discusses hydrocarbons, organic compounds made of carbon and hydrogen, categorized into aliphatic (linear chains) and aromatic (ring structures). Aliphatic hydrocarbons include saturated com...This page discusses hydrocarbons, organic compounds made of carbon and hydrogen, categorized into aliphatic (linear chains) and aromatic (ring structures). Aliphatic hydrocarbons include saturated compounds like methane and unsaturated types like ethylene. Aromatic hydrocarbons are based on benzene rings and occur in biological molecules, including amino acids, cholesterol, and hormones. Beta-carotene is highlighted as a hydrocarbon containing both aliphatic and aromatic components.
- https://bio.libretexts.org/Courses/Coastline_College/ENVS_C100%3A_Environmental_Science_(Hoerer)/02%3A_Environmental_Chemistry/2.05%3A_Green_Chemistry_and_the_Ten_Commandments_of_Sustainability_(Manahan)/2.5.03%3A_The_Elements_-_Basic_Building_Blocks_of_Green_Chemicals/2.5.3.02%3A_Hydrogen_-_The_Simplest_AtomSo elemental hydrogen generated by the application of electrical energy to water provides a source of energy that can be moved from one place to another and utilized to produce electricity in fuel cel...So elemental hydrogen generated by the application of electrical energy to water provides a source of energy that can be moved from one place to another and utilized to produce electricity in fuel cells (see below) or for other beneficial purposes such as the synthesis of ammonia essential as a source of plant fertilizer nitrogen.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_2%3A_The_Physical_Environment/2.1%3A_Properties_of_WaterDo you ever wonder why scientists spend time looking for water on other planets? It is because water is essential to life; even minute traces of it on another planet can indicate that life could or di...Do you ever wonder why scientists spend time looking for water on other planets? It is because water is essential to life; even minute traces of it on another planet can indicate that life could or did exist on that planet. Water is one of the more abundant molecules in living cells and the one most critical to life as we know it. Approximately 60–70 percent of your body is made up of water. Without it, life simply would not exist.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_20%3A_Biogeochemical_Cycles/20.1%3A_Introduction_to_Biogeochemical_CyclesThe recycling of inorganic matter between living organisms and their environment is called a biogeochemical cycle. It is important to remember that while matter and energy are processed in cycles, th...The recycling of inorganic matter between living organisms and their environment is called a biogeochemical cycle. It is important to remember that while matter and energy are processed in cycles, they are not necessarily moving in a simple circle and do not really have a beginning or an end. Today, anthropogenic activities are altering all major ecosystems and the biogeochemical cycles they drive.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/02%3A_The_Physical_Environment/2.01%3A_Properties_of_WaterDo you ever wonder why scientists spend time looking for water on other planets? It is because water is essential to life, as we understand it; even minute traces of it on another planet can indicate ...Do you ever wonder why scientists spend time looking for water on other planets? It is because water is essential to life, as we understand it; even minute traces of it on another planet can indicate that life could or did exist on that planet. Water is one of the more abundant molecules in living cells and the one most critical to life as we know it. Approximately 60–70 percent of your body is made up of water. Without it, life simply would not exist.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/01%3A_The_Chemical_Basis_of_Life/1.04%3A_Noncovalent_BondingThis page discusses noncovalent bonding's importance in biological systems, highlighting its role in stabilizing DNA and protein structures and enabling key interactions like enzyme-substrate binding ...This page discusses noncovalent bonding's importance in biological systems, highlighting its role in stabilizing DNA and protein structures and enabling key interactions like enzyme-substrate binding and antibody-antigen recognition. The main types of noncovalent forces include ionic interactions (which depend on pH and salt concentration), hydrophobic interactions (favoring nonpolar residues), and hydrogen bonds (involving electronegative atoms and hydrogen).
