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
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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
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.
Goblet cells are located in columnar epithelium and secrete mucus.
a. true b. false
One of the pyrimidine bases in a DNA molecule is adenine
__________________ Indicate whether the statement is true or false.