Which reptile group is considered to be the immediate ancestor of mammals?
a. captorhinomorphs d. therapsids
b. pelycosaurs e. coelacanths
c. labyrinthodonts
D
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What is a universalizing religion and what are the major and some minor universalizing religions in the world?
What will be an ideal response?
Humans have dramatically altered the rate of nitrogen fixation into forms usable by autotrophs ________
A) by producing synthetic fertilizers and applying them to crops, lawns, and parks B) due to the burning of fossil fuels to meet our energy needs C) because of the erosion of farmlands through poor agricultural practices D) by using antibiotics to reduce the numbers of denitrifying bacteria E) by selectively removing leguminous plants
Which of the following would be most useful in investigating groundwater contamination?
A. a map showing contours of the water table and of contamination levels B. records of health problems, like leukemia, of people living in the area C. records of how much material the company may have spilled D. a geologic map
Water waves that oscillate back and forth are called ____________________
Fill in the blank with correct word.