What is the defining characteristic of a redox reaction?
A. Oxygen is created as one of the products.
B. Electrons are transferred from an electron donor to an electron acceptor.
C. Reduction reactions first release an electron and then later oxidation reactions accept the electron.
B. Electrons are transferred from an electron donor to an electron acceptor.
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A population of metabolically related microorganisms is called a(n)
A) guild. B) niche. C) ecosystem. D) haplotype.
A climograph portrays the particular combination of temperature and rainfall conditions where each
terrestrial biome occurs.
Indicate whether the statement is true or false.The presence of a loop of Henle in nephrons is an evolutionary adaptation that enables mammals and birds to reabsorb water efficiently and produce a ____________ urine.
A. hypertonic B. osmolar C. isotonic D. hypotonic
Carbohydrates are used by our cell organelles called ________________ to perform respiration and produce a molecule of energy called_________________.
a. ribosomes and DNA b. Mitochondria, ATP c. Nucleus,ATP d. Mitochondria , DNA