Which of the following techniques is most efficient for transforming bacterial cells?
A) Gene gun
B) ES cell transfer
C) Electroporation
D) Pronuclear microinjection
E) Sperm-mediated transfer
C
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Describe the packing of chromatin from the 10-nm to the 30-nm fiber stage. What is the role of histones?
What will be an ideal response?
Why does the C/N ratio decline over time?
A) Mass increases over time. B) Mass is converted into microbes over time. C) Mass is converted into plants over time. D) More carbon is introduced into the system.
Scientists use shared biological components to determine relationships among the three domains of life. What is an example of an organelle used for this purpose?
What will be an ideal response?
which is not a thought to be a factor in the development of parasomnias (of arousal)?
-those that deepen sleep, such as alcohol -genetics -those that disrupt sleep, such as pain -all of the above may be factors in the occurrence of parasomnia