Which metabolic strategy is MOST common in chemolithotrophic mats?
A) ammonia oxidation
B) iron oxidation
C) nitrate reduction
D) sulfur oxidation
Answer: D
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Carbohydrates are polymers formed of structural units called:
A. amino acids. B. fatty acids. C. nucleotides. D. glycerols. E. monosaccharides.
Biogeochemical cycles describe ____
a. the constant recycling of nutrients between biotic and abiotic components of ecosystems b. pathways by which energy and nutrients move through biotic components of ecosystems c. all available nutrients in an ecosystem
d. a series of mathematical equations that define an ecosystem’s most important relationships e. the input of solar energy into a closed ecosystem
Reabsorption is the movement of water and solutes from the ____ to the ____
a. interstitial fluid; nephron tubules b. glomerular capillaries; Bowman's capsule c. Bowman's capsule; nephron tubules d. nephron tubules; peritubular capillaries e. glomerular capillaries; peritubular capillaries
Which of the following carbohydrates is made by plants and is not digested by humans?
A) lactose B) starch C) glycogen D) cellulose