Which of the following is a virus with an icosahedral head, a capsid that contains primarily three proteins, a connecting neck with a collar and long whiskers, a long tail and a complex base plate?

A. influenza virus
B. tuberculosis
C. measles virus
D. HIV
E. T4 bacteriophage


Answer: E

Biology & Microbiology

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What does it mean when it is said that the tree of human evolution is shallow?

A. that only humans that have the same ethnicity will share a recent common ancestor B. that humans haven't evolved much C. that all humans, no matter how distantly related they are, share a recent common ancestor D. that only humans on the same continent will share a recent common ancestor E. None of the answer options is correct.

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The synthesis of the daughter strand of DNA occurs away from the replication fork in the leading strand

Indicate whether the statement is true or false

Biology & Microbiology

Which of the following are features of guard cells that enable them to function?

A. thick inner walls B. chloroplasts C. cellulose microfibrils D. their shape E. All of these are true

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In the scientific name, Pan paniscus, Pan

represents the name of the ____ while paniscus represents the name of the ____.

a. family; species. b. family; genus. c. genus; species. d. species; genus. e. genus; family

Biology & Microbiology