In the experiments of Griffith, the conversion of nonlethal R-strain bacteria to lethal S-strain bacteria:a
was due to genetic mutation.
b. was due to transformation.
c. proved that proteins are the genetic material.
d. could not be reproduced by other researchers.
e. was similar to experiments performed by Watson and Crick.
b
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A mature walled ascus of an ascomycete usually contains
A. eight diploid nuclei. B. eight haploid nuclei. C. many multinucleate conidia. D. an egg and a sperm. E. a zygote.
Which of the following items are typically irradiated in order to kill microbes?
A. Operating room air B. Human tissues such as heart valves and skin C. Surgical gloves D. Cured meats E. All of the choices are correct.
Clues from geology and paleontology suggest that simple cells or their precursors arose about.
A. six billion years ago. B. six million years ago. C. four billion years ago. D. four million years ago. E. one million years ago.
A meniscus is made up of synovial fluid found within a joint.
Answer the following statement true (T) or false (F)