One symptom of kidney failure can be the appearance of blood in the urine. This would indicate that which part of the kidney was damaged?
What will be an ideal response?
glomerulus
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Researchers studying the rigidity and flexibility of the cell envelope used chemotaxis to measure the ability of microbes to squeeze through tight spaces. E. coli, a gram-negative bacterium, was able to traverse narrower channels than B. subtilis, a gram-positive microbe, even though both cells are the same size when grown without restriction. E. coli has the more flexible cell envelope because
A. it has only a single membrane. B. lipopolysaccharide has no charge. C. it has fewer flagella. D. there is less structural carbohydrate. E. there are fewer protein receptors.
An absorption spectrum is a graph that shows ________
a. absorption of different wavelengths of light by a pigment b. photosynthetic activity at various wavelengths of light c. wavelengths of visible light only d. wavelengths of various forms of radiation
If a different scientist was comparing the soil nutrients in a region where Venus fly-traps live to soil components in other ecosystems, which type of ecology would that be?
a. population ecology b. community ecology c. ecosystem ecology d. organismal ecology
Which of these is a correct statement about pH?
A) The pH of a solution increases as its acidity increases. B) The pH of a basic or alkaline solution is less than that of an acidic solution. C) As the concentration of H+ increases in a solution, the pH decreases. D) A solution to which HCl has been added will have a greater pH than a solution to which NaOH has been added. E) Each number on the pH scale represents an increase of 108.