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.
Answer: A
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Young freshwater turtles typically leave their parental population and ____ to another turtle population in a pond some distance away. What is the correct ecological term for this?
a. immigrate b. relocate c. travel d. expand e. integrate
Acidic solutions have a pH that is
a. less than 7 b. between 7 and 14 c. more than 7
Which genes are probably being transferred from transgenic plants to non-transgenic ones via pollen carried by wind or insects?
A. Insecticide resistance B. Glyphosate resistance C. Antibacterial resistance D. Early ripening E. ?-carotene
Answer the following statement(s) true (T) or false (F)
The first seven pairs of ribs are called floating ribs because they have only indirect cartilage attachments to the sternum.