The chemical oxygen demand (COD) of a body of water is determined using a(n)
A) microelectrode.
B) oxygenator.
C) spectrophotometer to determine the OD540nm.
D) strong oxidizing agent.
Answer: D
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Integrins are integral membrane proteins. They are often attached to _____
A) the membranes of intracellular organelles B) cytoskeletal proteins and proteins in the extracellular matrix C) the outside of the plasma membrane D) glycogen molecules and other types of cellular inclusions
Which event probably made the evolution of cellular respiration possible?
a. accumulation of carbon dioxide in atmosphere b. emergence of prokaryotes c. accumulation of oxygen in atmosphere d. emergence of eukaryotes e. emergence of plants
Is it possible to be a "carrier" (phenotypically normal but capable of passing the allele to one's offspring) for a genetic disease exhibiting this type of inheritance?
a. Yes b. No
Why do photosynthetic microbial mats assemble in the way they do (in terms of green bacteria, purple bacteria, cyanobacteria, and sulfate reducers)? Be sure to explain why the species assemble in the order they do (from top to bottom) and why the layers of different species may be more or less thick compared to others.
What will be an ideal response?