Acid rain forms by ____

a. increased rainfall over oceans
b. strip mining chemicals dissolved in groundwater
c. acids dissolved in atmospheric water
d. rising summer temperatures
e. ozone destruction by acids


ANSWER: c

Biology & Microbiology

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Which of the following correctly matches a cell or group of cells with its ability to differentiate into different specialized cells? (Select all correct choices.)

A. fertilized egg: pluripotent B. mesoderm: pluripotent C. endoderm: multipotent D. fertilized egg: multipotent E. ectoderm: totipotent

Biology & Microbiology

When nitrate is reduced to dinitrogen gas (N2), nitrogen is removed from the ecosystem and returned to the atmosphere through a series of reactions collectively known as ________.

A. denitrification B. nitrogen fixation C. anammox reaction D. All of the choices are correct.

Biology & Microbiology

Goblet cells are located in columnar epithelium and secrete mucus.

a. true b. false

Biology & Microbiology

One of the pyrimidine bases in a DNA molecule is adenine

__________________ Indicate whether the statement is true or false.

Biology & Microbiology