A stratified ocean in the Late Permian could have been caused by ____
a. global warming
b. global cooling
c. ocean circulation
d. increased downwelling
e. decreasing population of trilobites
a
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The range of a service is the minimum number of people needed to support the service
Indicate whether the statement is true or false.
Burmese pythons
A) have recently spread from their native southeast Asia to Africa and Europe. B) are an exponentially increasing invasive species released by pet owners into Everglades National Park. C) released into the wild have resulted in increases in small animal populations in south Florida. D) successfully control invasive feral boar populations in North Carolina.
Judge the following sentence according to the criteria given below: Biogenous sediment usually contains abundant calcite below the calcite compensation depth BECAUSE it readily dissolves above the calcite compensation depth
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Electron-dot structures are not so important for understanding
A. covalent bonds.
B. metallic bonds.
C.
| ionic bonds. |
D. polar covalent bonds.