At the present time, animals are responsible for _____ percent of the pollination of

angiosperms.



a. 10
b. 50
c. 75
d. 90


D

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

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?

Biology & Microbiology

Which of the following structures do not help the bacteria adhere to surfaces?

A) capsule B) pili C) fimbriae D) flagella E) slime layer

Biology & Microbiology