At the present time, animals are responsible for _____ percent of the pollination of
angiosperms.
a. 10
b. 50
c. 75
d. 90
D
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Most enveloped viruses use the host ________ membrane as their envelope source.
A. mitochondrial B. plasma C. nuclear D. none of these
In order for a malignant cancer to metastasize, it must:
A. lose its connections to adjacent cells. B. lose its connections to the extracellular matrix. C. become motile. D. All of the above are correct.
Match each of the proteins involved in DNA replication with its function
a. DNA helicase b. Topoisomerase II c. Single-stranded binding proteins d. DNA polymerase _____ Attaches DNA nucleotides to an RNA primer _____ Unwinds the DNA duplex _____ Relieves the stress on the replication fork caused by unwinding _____ Proofreads the growing DNA strands and replaces mismatched nucleotides _____ Prevents strands of DNA from rejoining after being unwound What will be an ideal response?
Which of the following structures do not help the bacteria adhere to surfaces?
A) capsule B) pili C) fimbriae D) flagella E) slime layer