The rhizosphere is the

a. soil interface that contains oxygen.
b. soil that receives secretions from plant roots.
c. soil that lacks active bacteria.
d. topmost 1 m of soil.


Answer: B

Biology & Microbiology

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A predictable effect of genetic drift in a small population is an increase in _____

a. mutations b. dominant alleles c. recessive alleles d. genetic variation e. homozygosity

Biology & Microbiology

The standard state of dilute aqueous solutions is at a temperature of ________°C (298 K), ________ atmosphere(s) of pressure, and with products and reactants present in concentration of ________ mol/L

Fill in the blank with correct word.

Biology & Microbiology

In Figure 12-1, the portion of the molecule in box __________ is


a. 1
b. 3
c. 4
d. 1 and 3
e. 3 and 4

Biology & Microbiology

Acid-fast cells such as Mycobacterium lose the color of the primary stain in the presence of hydrochloric acid.

Answer the following statement true (T) or false (F)

Biology & Microbiology