In the overall process of glycolysis and cellular respiration, _______ is oxidized and _______ is reduced.
Fill in the blank(s) with the appropriate word(s).
Answer: glucose / oxygen
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The addition of excess phosphorus causes lakes to become eutrophic because the nutrients trigger blooms of
photosynthetic cyanobacteria. Why do these blooms cause low oxygen levels in lakes?
a. Cyanobacteria use up more oxygen than they produce. b. Excess phosphorus binds to dissolved oxygen in the water. c. Cyanobacteria are net producers of oxygen while alive, but when they die aerobic bacteria use oxygen while decomposing them. d. Cyanobacterial blooms only occur in waters naturally low in oxygen. e. Cyanobacteria are aerobic heterotrophs, consuming oxygen and producing carbon dioxide.
Which statement is true?
a. All animals with hearts have closed circulatory systems. b. Birds and crocodiles have pulmocutaneous circulation. c. All blood circulated through fish hearts is deoxygenated. d. Double circulation is a feature of all mammals and some birds.
When signal molecules bind to two tyrosine kinase receptors, the receptors move closer to each other
and form a monomer. __________________ Indicate whether the statement is true or false.
If a 2200 kg whale were to die, how much of it would be consumed before it reaches the organisms that live at the deep sea bottom?
A. 2178 kg B. 420 kg C. 1200 kg D. 22 kg E. 220 kg