The greatest rate of extinction of all time is/was probably caused by ____
a. an ice age
b. unknown reasons
c. formation of Pangea
d. human activity
e. asteroid impact
D
Biology & Microbiology
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Glucose and fructose, which have the same chemical formula, are considered stereoisomers
Indicate whether the statement is true or false.
Biology & Microbiology
What enzyme is responsible for unwinding the DNA during replication?
a. DNA polymerase b. DNA ligase c. helicase d. primase
Biology & Microbiology
The Palearctic realm is designated by
a. A. b. B. c. C. d. D. e. E.
Biology & Microbiology
Minicells result from mutations that
a. prevent DNA replication. b. prevent septum formation. c. prevent growth of the cell. d. prevent chromosome partitioning. e. cause septa to be formed in the wrong place or to be formed too frequently.
Biology & Microbiology