Scientific studies have shown that fish exposed to PAHs in crude oil exhibited changes in ________ that are linked to developmental abnormalities, decreased embryo survival, and lower reproductive success
A) blood concentrations
B) body temperature
C) gene expression
D) heart rate
E) metabolism
C
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How does mountain building relate to the growth of continents?
What will be an ideal response?
The erosional features shown in this image from Mars are thought to have been formed by
A. tectonics. B. glaciers. C. running water. D. wind.
Prior to unification, communist West Germany was occupied by Soviet forces
a. True b. False Indicate whether the statement is true or false
What is the function of the thick outer coverings of rattlesnakes and insects in desert biomes?
a. to prevent sunburn b. to reduce water loss through evaporation c. to prevent drowning during typical desert flash floods d. to prevent sunburn and reduce water loss e. for protection during competitive action during mating seasons