In addition to eutrophication in lakes, which process is being caused by excess nutrients in rivers?
A. warming of the water in the Gulf of Mexico
B. introduction of exotic species like Zebra mussels
C. the dead zone in the Gulf of Mexico
D. decreased plant growth
E. clogging of city water lines
C. the dead zone in the Gulf of Mexico
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A gene is a DNA sequence that codes for a protein or _____ product
a. RNA b. DNA
c. ribosomes d. a lipid e. exons
While on safari in Serengeti National Park, Tanzania, your friend ventures away from camp and is bitten by a boomslang snake. The venom will cause hemorrhaging and death within hours. Fortunately, you are prepared and administer artificially acquired passive immunity. With what did you inject your friend?
A) antigen B) snake venom C) penicillin D) antibodies
What was the most important adaptation of the reptiles and birds to life on land?
A. The impermeable egg B. The shelled egg C. The external egg D. The amniotic egg
One application of the knowledge of sugar flow in xylem allows for the collecting of sap from maple trees in the
A. summer. B. fall. C. winter. D. early spring. E. None of these is correct.