Why is the presence of clay particles important in soil?
a. They provide macronutrients- particularly nitrogen, phosphorus, and potassium.
b. They bind metal ions, which would be toxic if absorbed by plants.
c. They allow water to percolate through the soil, making oxygenrich air pockets available.
d. The negative charges on clay bind to positively charged ions and prevent them from leaching.
Answer: d. The negative charges on clay bind to positively charged ions and prevent them from leaching.
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Which organisms should be used to perform quality control on hippurate reagent?
a. C. coli and Campylobacter concisus b. Campylobacter curvus and Campylobacter hyointestinalis c. C. jejuni subsp. jejuni and C. jejuni subsp. doylei d. C. jejuni subsp. jejuni and Campylobacter coli
The Golden Age of Medical Microbiology
A. occurred during the late 1800s to early 1900s. B. started in the 1990s with the advent of genetic engineering. C. is a time when the knowledge of and techniques to work with bacteria blossomed. D. was when people realized that diseases could be caused by invisible agents. E. occurred during the late 1800s to early 1900s, is a time when the knowledge of and techniques to work with bacteria blossomed AND was when people realized that diseases could be caused by invisible agents.
The brief length of time when mammals and birds learn the appearance of a parent is called:a
imprinting. b. habituation. c. classical conditioning. d. operant conditioning. e. insight learning.
In populations of the greater prairie chicken in Illinois, genetic diversity was lost through
A) mutation and restored by natural selection. B) genetic drift and restored by natural selection. C) gene flow and restored by mutation. D) genetic drift and restored by gene flow.