________ produces short sequences of RNA, which allows polymerase to synthesize a new strand of DNA.
A. DNA primase.
B. DNA helicase.
C. DNA polymerase.
D. DNA topoisomerase.
E. DNA ligase.
A. DNA primase.
Biology & Microbiology
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A mass extinction is defined as
a. the permanent loss of major groups of organisms. b. the loss of 20% of a population. c. the rapid growth of species diversity in a particular area. d. the temporary loss of major groups of organisms. e. all of these.
Biology & Microbiology
Serological testing always involves reactions between specific antibody and antigen.
a. true b. false
Biology & Microbiology
The massive early jawed fishes were called
A. placoderms. B. coelacanths. C. lampreys. D. whales.
Biology & Microbiology
The spinal cord runs through, and is protected by, the __________.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology