Estuaries can experience fairly extreme changes in abiotic conditions. For example, estuaries can at different times be dominated by the ocean when freshwater input from upstream is minimal, or it can be freshwater dominated when there is a lot of flow coming into the estuary from upstream. This means that organisms that exist within estuaries must be able to tolerate a wide range of salinities. These are called euryhaline organisms. Estuary ecosystems also receive biotic inputs from both the ocean and from the upstream river. There are therefore a lot of scavengers that thrive within estuaries, such as crabs, mud prawns and clams. One primary producer group that is important for estuaries are mangroves, but they are not found in all estuaries. Estuaries act as important nursery areas for ocean fish, who come into the estuary to spawn.
Acids, bases, pH, and buffers
Acidity and basicity, proton concentration, the pH scale, and buffers.
Acids, bases, and pH
Autoionization of water
Arrhenius definition of acids and bases
Brønsted-Lowry definition of acids and bases
Definition of pH
Introduction to buffers
Acids, bases, pH, and buffers
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Practice: Acids, bases, and pH
Answer:
Urinary system /Renal/urinary tract maintain fluid and electrolyte balance, purify blood and excrete liquid waste (urine)
Integumentary system exterior protection of body and thermal regulation
Skeletal system structural support and protection, production of blood cells
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The protein that contributes to many of the skin's protective qualities is called keratin.
Answer: A. by composition and texture
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Explanation:
Scientists divide rock into three classes: igneous, sedimentary, and metamorphic. Each class can be further divided into more specific types of rock. To determine how to classify rocks, scientists observe their composition and texture. The minerals a rock contains determine the composition, or makeup, of that rock.